Platelet adenosine diphosphate receptor antagonists

ABSTRACT

Compounds of the following formula (I): 
                 
 
where a, b, R 1 , R 2 , R 3 , R 4  and R 6  are described herein, are useful as inhibitors of platelet adenosine diphosphate. Pharmaceutical compositions containing these compounds, methods of using these compounds as antithrombotic agents and processes for synthesizing these compounds are also described herein.

This application claims the benefit of U.S. Provisional PatentApplication No. 60/296,498, filed Jun. 6, 2001.

FIELD OF THE INVENTION

The invention relates to piperazine derivatives, their use as plateletadenosine diphosphate receptor antagonists, pharmaceutical compositionscontaining them and processes for their preparation.

BACKGROUND OF THE INVENTION

Platelets interact with the coagulation and fibrinolysis systems in themaintenance of hemostasis and in the pathogenesis of thrombosis andthromboembolism. Platelets rapidly adhere to damaged vascular tissue,and release a variety of prothrombotic, chemotactic, and mitogenicfactors, aimed at prompting hemostasis and wound healing. Platelets alsoplay an important role in arterial thrombosis, a common cause of deathand disability in patients with cardiovascular disease. Plateletinhibitors have been successfully used for secondary prevention ofarterial thrombosis in patients with coronary, cerebral, and peripheralvascular disease.

Platelets adhere to exposed subendothelium after vessel wall injury bybinding to von Willebrand factor (vWf) and collagen. This inducesplatelets to change shape from a disc shape to a round form withpseudopodia, which enforces platelet adhesion and aggregation. The finalcommon pathway for platelet aggregation is the activation of thefibrinogen receptor (GPIIb-IIIa). As a result, dimeric fibrinogenmolecules present in plasma can bind and link platelets together to formaggregates.

Activated platelets secrete their granule contents, many of which actdirectly on blood cells, including platelets themselves, andendothelium. Platelets contain several kinds of secretory granules. Thedense-granules contain adenosine diphosphate (“ADP”), adenosinetriphosphate (“ATP”) and serotonin. The α-granules contain severalplatelet-specific proteins (platelet factor 4 and β-thromboglobulin),growth factors (PDGF, TGF-β, EGF and ECGF) and coagulation factors(fibrinogen, Factor V and vWf). Platelets also secrete biologicallyactive arachidonic acid products. Well known is T×A₂ which is inhibitedby aspirin through irreversible inactivation of the cyclooxygenaseproducing T×A₂.

Many stimuli, such as thrombin, collagen, ADP and thromboxane A2 (T×A2),activate platelets by binding to their cell surface receptors. Most ofthese receptors are G-protein-coupled receptors. Activation ofG-proteins has been shown to be an essential event in plateletactivation. For example, platelets from Gq−/− mice do not aggregate inresponse to thrombin, collagen, ADP or T×A2 (Offermans, S. et al.,Nature (1998), Vol. 389, No. 11, pp. 183-185). Many down-streamsignaling events have been elucidated, including activation ofphospholipase-C (PLC) and protein kinase C, increase in intracellularcalcium concentration, decrease in cAMP level and tyrosinephosphorylation.

ADP plays a pivotal role in platelet activation. ADP not only causesprimary aggregation of platelets but is also responsible for thesecondary aggregation following activation by other agonists such asthrombin and collagen. Contained at very high concentrations in theplatelet dense-granules, ADP is released when platelets are activated toreinforce platelet aggregation. ADP-induced platelet activation plays animportant role in maintaining normal hemostasis. Several congenitalbleeding disorders have been linked to the decreased number of plateletADP receptors and deficiency of ADP-induced platelet aggregation.Patients having “storage pool disease”, which is due to defects in thestorage of nucleotides and/or their secretion from the plateletdense-granules, have impaired platelet aggregation in response tocollagen and other stimuli due to the absence of the amplificationeffects by ADP.

ADP-induced platelet activation also plays a key role in the initiationand propagation of thrombosis. Administration of ADP has been shown toinduce thrombus formation in rat and mice mesenteric venules. Incontrast, ADP-removing enzymes have been shown to dramatically reduceplatelet deposition on collagen and to inhibit laser-induced thrombosisin rat mesenteric arterioles and venules, supporting the theory that ADPplays a role in mediating platelet recruitment in thrombus formation.Several ADP-induced early signaling events in platelets have beendescribed. These include a transient rise in free cytoplasmic calcium,an inhibition of adenylate cyclase through activation of G_(i2), anincrease in cytosolic pH by activating the Na+/H+-exchange, and exposureof the platelet binding sites for fibrinogen independent of proteinkinase C. While these signaling events collectively contribute toplatelet aggregation, the specific role of each remains the subject ofon-going investigations.

The current model of ADP-induced platelet activation involves twoG-protein coupled purinergic receptors, one of which is coupled to theactivation of the phospholipase-C pathway (P2Y₁) and the other iscoupled to the inhibition of adenylate cyclase (P2Y_(AC)). P2Y_(AC) isthe best target for a platelet ADP receptor antagonist for severalreasons. First, P2Y_(AC) is predominately platelet specific. Secondly,it is required for ADP-induced aggregation. Thirdly, it plays animportant role in sustaining thrombin or collagen-induced aggregation.Finally, it is the molecular target for anti-aggregatory drugs such asClopidogrel and Ticlopidine. Both of these drugs have been shown to beefficacious in various thrombosis models. However, Clopidogrel has beenshown to be an irreversible inhibitor of platelet aggregation with aslow onset of action. Similarly, the ATP analogues, AR-C67085 andAR-C69931 MX, which are potent antagonists for ADP-induced plateletaggregation, have also been shown to be effective in thrombosis modelsand are currently under clinical investigation. All these findingsindicate that ADP is a critical mediator of arterial thrombus formationand hence an excellent target for antithrombotic intervention.

When the properties of current oral platelet inhibitors, such asaspirin, Clopidogrel and Ticlopidine are compared, it becomes clearthat, while relatively safe, current oral platelet inhibitors are onlymodestly effective in preventing thrombotic complications in patientswith underlying vascular disease. It is clear that there is a need inthis field for a potent, selective, reversible, orally active plateletADP receptor (P2Y_(AC)) inhibitor.

SUMMARY OF THE INVENTION

The compounds of the invention are antagonists of the platelet ADPreceptor, P2Y_(AC), and are therefore useful in treating disease-statescharacterized by thrombotic activity and in so doing are useful asantithrombotic agents in the treatment and prevention of thrombosis.Accordingly, in one aspect, the invention is directed to compoundsselected from the group consisting of the following formula (I):

wherein:

-   a and b are independently 1 to 4;-   A is ═CH— or ═N—;-   R¹ is hydrogen, alkyl, carboxyalkyl, aryl, aralkyl, alkylcarbonyl,    alkoxyalkoxyalkylcarbonyl, aryloxyalkylcarbonyl,    carboxyalkylcarbonyl, alkoxycarbonylalkylcarbonyl,    alkoxycarbonylalkyl, alkoxycarbonyl, arylcarbonyl, aryloxycarbonyl,    aralkoxycarbonyl, cycloalkylcarbonyl, haloalkoxycarbonyl,    aminocarbonyl, monoalkylaminocarbonyl, alkoxycarbonylaminocarbonyl,    alkylsulfonyl, arylsulfonyl, heterocyclyl, or heterocyclylcarbonyl;-   R² is hydrogen, alkyl, aryl, aralkyl, alkylsulfonylalkyl,    aralkoxyalkyl, hydroxyalkyl, aminoalkyl,    haloalkylsulfonylaminoalkyl, carboxyalkylthioalkyl,    alkoxycarbonylalkylthioalkyl, carboxyalkyl, (carboxy)(hydroxy)alkyl,    carboxyalkoxyalkyl, alkoxycarbonylalkyl, aralkoxycarbonylalkyl,    carboxyalkoxycarbonylalkyl, alkoxycarbonylalkoxycarbonylalkyl,    aminocarbonylalkyl, aralkoxycarbonylaminoalkyl,    alkoxycarbonylalkylaminocarbonylalkyl,    carboxyalkylaminocarbonylalkyl,    (alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl,    (carboxyalkyl)(alkyl)aminocarbonylalkyl, tetrahydrofuranonyl, or    heterocyclylalkyl;-   R³ is hydrogen, alkyl, hydroxy, halo, carboxyalkenyl, alkoxy,    alkoxycarbonyl, alkoxycarbonylalkoxy, di(alkoxycarbonyl)alkoxy,    carboxyalkoxy, di(carboxy)alkoxy, (carboxy)(hydroxy)alkoxy,    (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy, cyanoalkoxy,    haloalkoxy, haloalkenyloxy, carboxyalkenyloxy,    alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,    (cycloalkyl)(carboxy)alkoxy, alkylthio, carboxy,    (dialkylaminocarbonylalkyl)(alkyl)amino, (carboxyalkyl)(alkyl)amino,    (hydroxyalkyl)(alkyl)amino, (dialkylaminoalkyl)(alkyl)amino,    carboxyalkylamino, mono(alkoxycarbonylalkyl)aminocarbonyl,    mono(carboxyalkyl)aminocarbonyl,    mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,    mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,    mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,    dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,    mono(carboxyalkyl)aminocarbonylalkoxy,    mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,    alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy, heterocyclyl,    tetrahydrofuranonyloxy, or heterocyclylalkoxy;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy,    hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl,    alkylcarbonyl, nitro, amino, monoalkylamino, dialkylamino,    carboxyalkylamino, alkylcarbonylamino, di(alkylcarbonyl)amino,    hydroxyalkyl, dialkylaminoalkyl, carboxyalkoxy,    alkoxycarbonylalkoxy, dialkylaminoalkoxy, and heterocyclylalkoxy;-   each R⁵ is independently selected from the group consisting of    hydrogen, alkyl, hydroxyalkyl, aralkyl, carboxy, alkoxycarbonyl,    aralkoxycarbonyl, carboxyalkyl, and alkoxycarbonylalkyl;-   R⁶ is —N(R⁷)—C(O)— or —C(O)—N(R⁷)—;-   R⁷ is hydrogen, alkyl, carboxyalkyl, or alkoxycarbonylalkyl;-   as a single stereoisomer, a mixture of individual stereoisomers, or    a racemic mixture;-   or a pharmaceutically acceptable salt thereof.

In another aspect, this invention is directed to pharmaceuticalcompositions useful in treating a mammal having a disease-statecharacterized by thrombotic activity, which composition comprises apharmaceutically acceptable excipient and a compound of formula (I) asdefined above.

In another aspect, this invention is directed to methods of treatingdisease-states characterized by thrombotic activity, which methodscomprise administering to a mammal having a disease-state characterizedby thrombotic activity a therapeutically effective amount of a compoundof formula (I) as defined above.

DETAILED DESCRIPTION OF THE INVENTION

Definitions

As used in the specification and appended claims, unless specified tothe contrary, the following terms have the meaning indicated:

“Alkyl” refers to a straight or branched hydrocarbon chain radicalconsisting solely of carbon and hydrogen atoms, containing nounsaturation, having from one to eight carbon atoms, and which isattached to the rest of the molecule by a single bond, e.g., methyl,ethyl, n-propyl, 1-methylethyl (iso-propyl), n-butyl, n-pentyl,1,1-dimethylethyl (t-butyl), and the like. Unless stated otherwisespecifically in the specification, it is understood that for radicals,as defined below, that contain a substituted alkyl or alkenyl group thatthe substitution can occur on any carbon of the alkyl group.

“Alkylcarbonyl” refers to a radical of the formula —C(O)—R_(a) whereR_(a) is an alkyl radical as defined above, e.g., acetyl, ethylcarbonyl,n-propylcarbonyl, and the like.

“Alkylcarbonylamino” refers to a radical of the formula —N(H)—C(O)—R_(a)where R_(a) is an alkyl radical as defined above, e.g., acetylamino,ethylcarbonylamino, n-propylcarbonylamino, and the like.

“Alkylthio” refers to a radical of the formula —S—R_(a) where R_(a) isan alkyl radical as defined above, e.g., methylthio, ethylthio,n-propylthio, and the like.

“Alkylsulfonyl” refers to a radical of the formula —S(O)₂R_(a) whereR_(a) is an alkyl radical as defined above, e.g., methylsulfonyl,ethylsulfonyl, n-propylsulfonyl, and the like.

“Alkylsulfonylalkyl” refers to a radical of the formula—R_(a)—S(O)₂—R_(a) where each R_(a) is independently an alkyl radical asdefined above, e.g., methylsulfonylmethyl, 2-methylsulfonylethyl,2-ethylsulfonylpropyl, and the like.

“Alkenyl” refers to a straight or branched chain monovalent or divalentradical consisting solely of carbon and hydrogen, containing at leastone double bond and having from two to eight carbon atoms, e.g.,ethenyl, prop-1-enyl, but-1-enyl, pent-1-enyl, penta-1,4-dienyl, and thelike.

“Alkoxy” refers to a radical of the formula —OR_(a) where R_(a) is analkyl radical as defined above, e.g., methoxy, ethoxy, n-propoxy,1-methylethoxy (iso-propoxy), n-butoxy, n-pentoxy, 1,1-dimethylethoxy(t-butoxy), and the like.

“Alkoxycarbonyl” refers to a radical of the formula —C(O)OR_(a) whereR_(a) is an alkyl radical as defined above, e.g., methoxycarbonyl,ethoxycarbonyl, n-propoxycarbonyl, and the like.

“Alkoxycarbonylalkyl” refers to a radical of the formula—R_(a)—C(O)OR_(a) where each R_(a) is independently an alkyl radical asdefined above, e.g., methoxycarbonylmethyl,(1,1-dimethylethoxy)carbonylmethyl, 2-(methoxycarbonyl)ethyl, and thelike.

“Alkoxycarbonylaminocarbonyl” refers to a radical of the formula—C(O)—N(H)—C(O)OR_(a) where R_(a) is an alkyl radical as defined above,e.g., methoxycarbonylaminocarbonyl, ethoxycarbonylaminocarbonyl,n-propoxycarbonylaminocarbonyl, and the like.

“Alkoxycarbonylcycloalkoxy” refers to a radical of the formula—O—R_(c)—C(O)OR_(a) where R_(a) is an alkyl radical as defined above andR_(a) is a cycloalkyl radical as defined below, e.g.,1-methoxycarbonylcyclobut-1-oxy, 1-ethoxycarbonylcyclobut-1-oxy,1-n-propoxycarbonylcyclobutoxy, and the like.

“Alkoxyalkoxyalkylcarbonyl” refers to a radical of the formula—C(O)—R_(a)—O—R_(a)—O—R_(a) where each R_(a) is independently an alkylradical as defined above, e.g., 2-(ethoxy)ethoxymethylcarbonyl,3-(2-(n-butoxy)ethoxy)propylcarbonyl, and the like.

“Alkoxycarbonylalkyl” refers to a radical of the formula—R_(a)—C(O)OR_(a) where each R_(a) is independently an alkyl radical asdefined above, e.g., methoxycarbonylmethyl, 2-(ethoxycarbonyl)ethyl,2-(methoxycarbonyl)propyl, and the like.

“Alkoxycarbonylalkoxy” refers to a radical of the formula—O—R_(a)—C(O)OR_(a) where each R_(a) is independently an alkyl radicalas defined above, e.g., methoxycarbonylmethoxy,2-(ethoxycarbonyl)ethoxy, 2-(methoxycarbonyl)propoxy, and the like.

“Alkoxycarbonylalkenyloxy” refers to a radical of the formula—O—R_(d)—C(O)OR_(a) where R_(a) is an alkyl radical as defined above andR_(d) is an alkenyl radical as defined above, e.g.,2-(methoxycarbonyl)ethenyloxy, 3-(ethoxycarbonyl)prop-1-enyloxy, and thelike.

“Alkoxycarbonylalkylcarbonyl” refers to a radical of the formula—C(O)—R_(a)—C(O)OR_(a) where each R_(a) is independently an alkylradical as defined above, e.g., methoxycarbonylmethylcarbonyl,2-(ethoxycarbonyl)ethylcarbonyl, 2-(methoxycarbonyl)propylcarbonyl, andthe like.

“Alkoxycarbonylalkylaminocarbonylalkyl” refers to a radical of theformula —R_(a)—C(O)—N(H)—R_(a)—C(O)OR_(a) where each R_(a) isindependently an alkyl radical as defined above, e.g.,methoxycarbonylmethyl, 2-(ethoxycarbonyl)ethylaminocarbonylmethyl,2-(2-(methoxycarbonyl)propylaminocarbonyl)propyl, and the like.

“Alkoxycarbonylalkylthioalkyl” refers to a radical of the formula—R_(a)—S—R_(a)—C(O)OR_(a) where each R_(a) is independently an alkylradical as defined above, e.g., methoxycarbonylmethylthiomethyl,2-(ethoxycarbonyl)ethylthiomethyl,2-(2-(methoxycarbonyl)propylthio)propyl, and the like.

“Alkoxycarbonylalkoxycarbonylalkyl” refers to a radical of the formula—R_(a)—C(O)—O—R_(a)—C(O)OR_(a) where each R_(a) is independently analkyl radical as defined above, e.g., methoxycarbonylmethoxy,2-(ethoxycarbonyl)ethoxycarbonylmethyl,3-(2-(methoxycarbonyl)propoxycarbonyl)propyl, and the like.

“(Alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl” refers to a radical ofthe formula —R_(a)—C(O)—N(R_(a))—R_(a)—C(O)OR_(a) where each R_(a) isindependently an alkyl radical as defined above, e.g.,(methoxycarbonylmethyl)(methyl)aminocarbonylmethyl,2-((ethoxycarbonylmethyl)(methyl)aminocarbonyl)ethyl, and the like.

“Amino” refers to the —NH₂ radical.

“Aminoalkyl” refers to a radical of the formula —R_(a)—NH₂, e.g.,aminomethyl, 2-aminomethyl, 2-aminopropyl, and the like.

“Aminocarbonyl” refers to the —C(O)NH₂ radical.

“Aminocarbonylalkoxy” refers to a radical of the formula—O—R_(a)—C(O)NH₂, e.g., aminocarbonylmethoxy, 2-(aminocarbonyl)ethoxy,2-(aminocarbonyl)propoxy, and the like.

“Aminocarbonylalkyl” refers to a radical of the formula —R_(a)—C(O)NH₂,e.g., aminocarbonylmethyl, 2-(aminocarbonyl)ethyl,2-(aminocarbonyl)propyl, and the like.

“Aminocarbonylcycloalkoxy” refers to a radical of the formula—O—R_(c)—C(O)NH₂ where R_(c) is a cycloalkyl radical as defined below,e.g., 1-(aminocarbonyl)cyclobutoxy, 2-(aminocarbonyl)cyclohexyl, and thelike.

“Aryl” refers to a phenyl or naphthyl radical. Unless stated otherwisespecifically in the specification, the term “aryl” or the prefix “ar-”(such as in “aralkyl”) is meant to include aryl radicals optionallysubstituted by one or more substituents selected from the groupconsisting of hydroxy, hydroxyalkyl, halo, haloalkyl, haloalkoxy, alkyl,alkoxy, carboxy, alkoxycarbonyl, carboxyalkyl, alkoxycarbonylalkyl,carboxyalkoxy, alkoxycarbonylalkoxy, aminocarbonyl,monoalkylaminocarbonyl, dialkylaminocarbonyl, formyl,alkylcarbonylamino, nitro, cyano, amino, monoalkylamino, dialkylamino,and aminoalkyl, as defined herein. For R¹, preferred aryl radicals arethose radicals which are optionally substituted by one or moresubstituents selected from the group consisting of halo and alkyl. ForR², preferred aryl radicals are those radicals which are optionallysubstituted by one or more substituents independently selected from thegroup consisting of hydroxy, carboxyalkoxy and alkoxycarbonylalkoxy.

“Aralkyl” refers to a radical of the formula —R_(a)R_(b) where R_(a) isan alkyl radical as defined above, substituted by R_(b), an arylradical, as defined above, e.g., benzyl. For R¹, preferred aralkylradicals are those radicals wherein the R_(b) group is optionallysubstituted by one or more substituents independently selected from thegroup consisting of halo and alkyl. For R², preferred aralkyl radicalsare those radicals wherein the R_(b) group is optionally substituted byone or more substitutents independently selected from the groupconsisting of alkoxycarbonyl, carboxy, alkoxycarbonylalkoxy,carboxyalkoxy, and hydroxy. For R⁵, preferred aralkyl radicals are thoseradicals wherein the R_(b) group is optionally substituted by one ormore hydroxy radicals.

“Aryloxy” refers to a radical of the formula —OR_(b) where R_(b) is anaryl radical as defined above, e.g., phenoxy.

“Arylcarbonyl” refers to a radical of the formula —C(O)—R_(b) whereR_(b) is an aryl radical as defined above, e.g., phenylcarbonyl,(4-acetylaminophenyl)carbonyl, (2-methoxyphenyl)carbonyl, and the like.For R¹, preferred arylcarbonyl radicals are those radicals wherein theR_(b) group is optionally substituted by by one or more substituentsindependently selected from the group consisting of acetylamino,carboxy, aminocarbonyl, alkoxycarbonyl, haloalkoxy, alkoxy, and alkyl.

“Arylsulfonyl” refers to a radical of the formula —S(O)₂—R_(b) whereR_(b) is an aryl radical as defined above, e.g., phenylsulfonyl,4-chlorophenylsulfonyl, 4-methylphenylsulfonyl, and the like. For R¹,preferred arylsulfonyl radicals are those radicals wherein the R_(b)group is optionally substituted by one or more substituentsindependently selected from the group consisting of halo and alkyl.

“Aryloxycarbonyl” refers to a radical of the formula —C(O)OR_(b) whereR_(b) is an aryl radical as defined above, e.g., phenoxycarbonyl.

“Aryloxyalkylcarbonyl” refers to a radical of the formula—C(O)OR_(b)R_(a) where R_(e) is an alkyl radical, as defined above,substituted by R_(b), an aryl radical, as defined above, e.g.,phenoxymethylcarbonyl, (2-phenoxyethyl)carbonyl, and the like.

“Aralkoxy” refers to a radical of the formula —OR_(e) where R_(e) is anaralkyl radical as defined above, e.g., benzyloxy, 3-phenylpropoxy, andthe like.

“Aralkoxyalkyl” refers to a radical of the formula —R_(a)—OR_(e) whereR_(a) is an alkyl radical as defined above and R_(e) is an aralkylradical as defined above, e.g., benzyloxymethyl, 2-(benzyloxy)ethyl,2-(benzyloxy)propyl, and the like.

“Aralkoxycarbonyl” refers to a radical of the formula —C(O)OR_(e) whereR_(e) is an aralkyl radical as defined above, e.g., benzyloxycarbonyl,and the like.

“Aralkoxycarbonylalkyl” refers to a radical of the formula—R_(a)—C(O)OR_(e) where R_(a) is an alkyl radical as defined above andR_(e) is an aralkyl radical as defined above, e.g.,benzyloxycarbonylmethyl, 2-(benzyloxycarbonyl)ethyl,3-((naphthalen-2-yl)oxy)carbonyl)propyl, and the like.

“Aralkoxycarbonylaminoalkyl” refers to a radical of the formula—R_(a)—N(H)—C(O)OR_(e) where R_(a) is an alkyl radical as defined aboveand R_(e) is an aralkyl radical as defined above, e.g.,benzyloxycarbonylaminomethyl, 2-(benzyloxycarbonylamino)ethyl,2-(benzyloxycarbonylamino)propyl, and the like.

“Carboxy” refers to the —C(O)OH radical.

“Carboxyalkyl” refers to a radical of the formula —R_(a)—C(O)OH, whereR_(a) is an alkyl radical as defined above, e.g., carboxymethyl,2-carboxyethyl, 2-carboxypropyl and the like.

“Carboxyalkoxy” refers to a radical of the formula —O—R_(a)—C(O)OH,where R_(a) is an alkyl radical as defined above, e.g., carboxymethoxy,2-carboxyethoxy, 2-carboxypropoxy, and the like.

“Carboxyalkylcarbonyl” refers to a radical of the formula—C(O)—R_(a)—C(O)OH, where R_(a) is an alkyl radical as defined above,e.g., 2-carboxyethylcarbonyl, carboxymethylcarbonyl,3-carboxypropylcarbonyl, and the like.

“Carboxyalkylamino” refers to a radical of the formula—N(H)—R_(a)—C(O)OH where R_(a) is an alkyl radical as defined above,e.g., carboxymethylamino, 2-carboxyethylamino, 3-carboxypropylamino, andthe like.

“Carboxyalkylaminocarbonylalkyl” refers to a radical of the formula—R_(a)—C(O)—N(H)—R_(a)—C(O)OH where each R_(a) is independently an alkylradical as defined above, e.g., carboxymethylaminocarbonylmethyl,2-(carboxymethylaminocarbonyl)ethyl,2-(2-carboxyethyl)aminocarbonyl)ethyl,3-(2-carboxyethyl)aminocarbonyl)butyl, and the like.

“Carboxyalkylthioalkyl” refers to a radical of the formula—R_(a)—S—R_(a)—C(O)OH were each R_(a) is independently an alkyl radicalas defined above, e.g., carboxymethylthiomethyl,(1-carboxyethyl)thiomethyl, 2-((1-carboxypropyl)thio)ethyl, and thelike.

“Carboxyalkoxyalkyl” refers to a radical of the formula—R_(a)—O—R_(a)—C(O)OH where each R_(a) is independently an alkyl radicalas defined above, e.g., 2-(carboxymethoxy)ethyl,(2-carboxyethoxy)methyl, 3-(2-carboxypropoxy)propyl, and the like.

“Carboxyalkoxycarbonylalkyl” refers to a radical of the formula—R_(a)—C(O)—O—R_(a)—C(O)OH where each R_(a) is independently an alkylradical as defined above, e.g., carboxymethoxycarbonylmethyl,2-(carboxymethoxycarbonyl)ethyl, 2-((2-carboxyethoxy)carbonyl)propyl,and the like.

“Carboxyalkenyl” refers to a radical of the formula —R_(d)—C(O)OH whereR_(d) is an alkenyl radical as defined above, e.g., 2-carboxyethenyl,3-carboxyprop-1-enyl, 3-carboxybut-1-enyl and the like.

“Carboxyalkenyloxy” refers to a radical of the formula —O—R_(d)—C(O)OHwhere R_(d) is an alkenyl radical as defined above, e.g.,2-carboxyethenyloxy, 3-carboxyprop-1-enyloxy, 3-carboxybut-1-enyloxy,and the like.

“Cycloalkyl” refers to a stable 3- to 10-membered monocyclic or bicyclicradical which is saturated, and which consist solely of carbon andhydrogen atoms, e.g., cyclopropyl, cyclobutyl, cyclobutyl, cyclohexyl,decalinyl and the like. Unless otherwise stated specifically in thespecification, the term “cycloalkyl” is meant to include cycloalkylradicals which are optionally substituted by one or more substituentsindependently selected from the group consisting of alkyl, halo,hydroxy, amino, nitro, alkoxy, carboxy, phenyl and alkoxycarbonyl.

“Cycloalkylcarbonyl” refers to a radical of the formula —C(O)—R_(c)where R_(c) is a cycloalkyl radical as defined above, e.g.,cyclobutylcarbonyl, cyclopropylcarbonyl, and the like. For R¹, apreferred cycloalkylcarbonyl radical is that radical wherein the R_(c)group is optionally substituted by a phenyl group.

“(Cycloalkyl)(alkoxycarbonyl)alkoxy” refers to a radical of the formula—OR_(a)(R_(c))—C(O)OR_(a) where each R_(a) is independently an alkylradical as defined above and R_(c) is a cycloalkyl radical as definedabove, e.g., (cyclohexyl)(methoxycarbonyl)methoxy,(cyclobutyl)(ethoxycarbonyl)methoxy, and the like.

“(Cycloalkyl)(carboxy)alkoxy” refers to a radical of the formula—OR_(a)(R_(c))—C(O)OH where R_(a) is an alkyl radical as defined aboveand R_(c) is a cycloalkyl radical as defined above, e.g.,(cyclohexyl)(carboxy)methoxy, (cyclobutyl)(carboxy)methoxy, and thelike.

“Carboxycycloalkoxy” refers to a radical of the formula —O—R_(c)—C(O)OHwhere R_(c) is a cycloalkyl radical as defined above, e.g.,1-carboxycyclobut-1-oxy, 1-carboxycyclohex-1-oxy, and the like.

“(Carboxy)(hydroxy)alkoxy” refers to a radical of the formula—O—R_(a)(OH)—C(O)OH wherein R_(a) is an alkyl radical defined abovesubstituted by an hydroxy radical and a carboxy radical, as definedherein, e.g., 1-carboxy-3-hydroxypropoxy, 2-carboxy-4-hydroxybutoxy,1-carboxy-5-hydroxypent-2-oxy, and the like.

“(Carboxy)(hydroxy)alkyl” refers to a radical of the formula—R_(a)(OH)—C(O)OH wherein R_(a) is an alkyl radical defined abovesubstituted by an hydroxy radical and a carboxy radical, as definedherein, e.g., 1-carboxy-3-hydroxypropyl, 2-carboxy-4-hydroxybutyl,1-carboxy-5-hydroxypent-2-yl, and the like.

“(Carboxyalkyl)(alkyl)amino” refers to a radical of the formula—N(R_(a))—R_(a)—C(O)OH wherein each R_(a) is independently an alkylradical as defined above, and wherein the nitrogen atom is substitutedby the R_(a) group and the —R_(a)—C(O)OH group, e.g.,(carboxyethyl)(ethyl)amino, (2-carboxyethyl)(methyl)amino, and the like.

“(Carboxyalkyl)(alkyl)aminocarbonylalkyl” refers to a radical of theformula —R_(a)—C(O)—N(R_(a))—R_(a)—C(O)OH wherein each R_(a) isindependently an alkyl radical as defined above, and wherein thenitrogen atom is substituted by the R_(a) group and the —R_(a)—C(O)OHgroup, e.g., (carboxyethyl)(ethyl)aminocarbonylmethyl,2-((2-carboxyethyl)(methyl)aminocarbonyl)ethyl, and the like.

“Cyano” refers to the —C≡N radical.

“Cyanoalkoxy” refers to a radical of the formula —O—R_(a)—C≡N whereR_(a) is an alkyl radical as defined above, e.g., 2-cyanoethoxy,2-cyanopropoxy, 4-cyanobut-2-oxy, and the like.

“Dialkylamino” refers to a radical of the formula —N(R_(a))—R_(a) whereeach R_(a) is independently an alkyl radical, e.g., dimethylamino,diethylamino, methylethylamino, and the like.

“Dialkylaminocarbonyl” refers to a radical of the formula—C(O)—N(R_(a))—R_(a) where each R_(a) is independently an alkyl radical,e.g., dimethylaminocarbonyl, diethylaminocarbonyl,methyl(ethyl)aminocarbonyl, and the like.

“Dialkylaminoalkyl” refers to a radical of the formula—R_(a)—N(R_(a))—R_(a) where each R_(a) is independently an alkyl radicalas defined above, e.g., dimethylaminomethyl, 2-(diethylamino)ethyl,3-(methyl(ethyl)amino)propyl, and the like.

“Dialkylaminoalkoxy” refers to a radical of the formula—O—R_(a)—N(R_(a))—R_(a) where each R_(a) is independently an alkylradical as defined above, e.g., dimethylaminomethoxy,2-(diethylamino)ethoxy, 3-(methyl(ethyl)amino)propoxy, and the like.

“Dialkylaminocarbonylalkoxy” refers to a radical of the formula—O—R_(a)—C(O)—N(R_(a))—R_(a) where each R_(a) is independently an alkylradical, e.g., dimethylaminocarbonylmethoxy,diethylaminocarbonylmethoxy, 2-(methyl(ethyl)aminocarbonyl)ethoxy, andthe like.

“Di(alkoxycarbonyl)alkoxy” refers to a radical of the formula—O—R_(a)(C(O)O—R_(a))—C(O)O—R_(a) where each R_(a) is independently analkyl radical as defined above, e.g., di(methoxycarbonyl)methoxy,di(ethoxycarbonyl)methoxy, 2,2-di(ethoxycarbonyl)ethoxy, and the like.

“Di(carboxy)alkoxy” refers to a radical of the formula—O—R_(a)(C(O)OH)—C(O)OH where each R_(a) is independently an alkylradical as defined above, e.g., di(carboxy)methoxy, di(carboxy)methoxy,2,2-di(carboxy)ethoxy, and the like.

“Di(alkylcarbonyl)amino” refers to a radical of the formula—N(C(O)—R_(a))—C(O)—R_(a) where each R_(a) is independently an alkylradical as defined above, e.g., di(acetyl)amino, di(ethylcarbonyl)amino,and the like.

“(Dialkylaminoalkyl)(alkyl)amino” refers to a radical of the formula—N(R_(a))—R_(a)—N(R_(a))R_(a), where each R_(a) is independently analkyl radical as defined above and where each nitrogen atom isdisubstituted, e.g., (dimethylaminomethyl)(methyl)amino,(diethylaminomethyl)(methyl)amino, (2-(dimethylamino)ethyl)(ethyl)amino,and the like.

“(Dialkylamino)(carboxy)alkoxy” refers to a radical of the formula—O—R_(a)(C(O)OH)—N(R_(a))R_(a), where each R_(a) is independently analkyl radical as defined above and where the first R_(a) group issubstituted by a —C(O)OH group and a —N(R_(a))R_(a) group, e.g.,3-dimethylamino-1-carboxymethoxy, 4-diethylamino-1-carboxymethoxy, andthe like.

“(Dialkylaminocarbonylalkyl)(alkyl)amino” refers to a radical of theformula —N(R_(a))—R_(a)—C(O)—N(R_(a))R_(a) where each R_(a) isindependently an alkyl radical as defined above and where each nitrogenatom is disubstituted, e.g., (dimethylaminocarbonylmethyl)(methyl)amino,(diethylaminocarbonylmethyl)(methyl)amino,(2-(diethylaminocarbonyl)ethyl)(ethyl)amino, and the like.

“Formyl” refers to the radical —C(O)H.

“Halo” refers to bromo, chloro, iodo or fluoro.

“Haloalkyl” refers to an alkyl radical, as defined above, that issubstituted by one or more halo radicals, as defined above, e.g.,trifluoromethyl, difluoromethyl, trichloromethyl, 2,2,2-trifluoroethyl,1-fluoromethyl-2-fluoroethyl, 3-bromo-2-fluoropropyl,1-bromomethyl-2-bromoethyl, and the like.

“Haloalkylsulfonylaminoalkyl” refers to a radical of the formula—R_(a)—N(H)—S(O)₂R_(f) where R_(a) is an alkyl radical as defined aboveand R_(f) is a haloalkyl radical as defined above, e.g.,2-(trifluoromethoxysulfonylamino)ethyl,3-(trifluoromethoxysulfonylamino)propyl, and the like.

“Haloalkenyl” refers to an alkenyl radical, as defined above, that issubstituted by one or more halo radicals, as defined above, e.g.,1,2-difluoroethenyl, 3-bromo-2-fluoroprop-1-enyl, 1,2-dibromoethenyl,and the like.

“Haloalkoxy” refers to a radical of the formula —OR_(f) where R_(f) isan haloalkyl radical as defined above, e.g., trifluoromethoxy,difluoromethoxy, trichloromethoxy, 2,2,2-trifluoroethoxy,1-fluoromethyl-2-fluoroethoxy, 3-bromo-2-fluoropropoxy,1-bromomethyl-2-bromoethoxy, and the like.

“Haloalkenyloxy” refers to a radical of the formula —OR_(g) where R_(g)is an haloalkenyl radical as defined above, as defined above, e.g.,1,2-difluoroethenyloxy, 3-bromo-2-fluoroprop-1-enyloxy,1,2-dibromoethenyloxy, and the like.

“Haloalkoxycarbonyl” refers to a radical of the formula —C(O)OR_(f)where R_(f) is an haloalkyl radical as defined above, e.g.,trifluoromethoxycarbonyl, difluoromethoxycarbonyl,trichloromethoxycarbonyl, 2,2,2-trifluoroethoxycarbonyl,1-fluoromethyl-2-fluoroethoxycarbonyl, 3-bromo-2-fluoropropoxycarbonyl,1-bromomethyl-2-bromoethoxycarbonyl, and the like.

“Hydroxy” refers to the —OH radical.

“Hydroxyalkyl” refers to a alkyl radical as defined above that issubstituted by a hydroxy radical, e.g., hydroxymethyl, 2-hydroxyethyl,2-hydroxypropyl, 3-hydroxypropyl, 4-hydroxybutyl, 3-hydroxybutyl, andthe like.

“Hydroxyalkoxy” refers to a radical of the formula —OR_(a)—OH whereR_(a) is an alkyl radical as defined above, e.g., 2-hydroxyethoxy,2-hydroxypropoxy, 4-hydroxybutoxy, 3-hydroxybutoxy, and the like.

“(Hydroxyalkyl)(alkyl)amino” refers to a radical of the formula—N(R_(a))—R_(a)—OH where each R_(a) is independently an alkyl radical asdefined above, e.g., (2-hydroxyethyl)(methyl)amino,(2-hydroxyethyl)(ethyl)amino, (3-hydroxypropyl)(ethyl)amino, and thelike.

“Heterocyclyl” refers to a stable 3- to 15-membered ring radical whichconsists of carbon atoms and from one to five heteroatoms selected fromthe group consisting of nitrogen, oxygen and sulfur. For purposes ofthis invention, the heterocyclyl radical may be a monocyclic, bicyclicor tricyclic ring system, which may include fused or bridged ringsystems; and the nitrogen, carbon or sulfur atoms in the heterocyclylradical may be optionally oxidized; the nitrogen atom may be optionallyquaternized; and the heterocyclyl radical may be aromatic or partiallyor fully saturated. The heterocyclyl radical may be attached to the mainstructure at any heteroatom or carbon atom which results in the creationof a stable compound. Examples of such heterocyclyl radicals include,but are not limited to, azepinyl, acridinyl, benzimidazolyl,benzthiazolyl, benzoxazolyl, benzopyranyl, benzopyranonyl, benzofuranyl,benzofuranonyl, benzothienyl, carbazolyl, cinnolinyl,decahydroisoquinolyl, dioxolanyl, furanyl, furanonyl, isothiazolyl,imidazolyl, imidazolinyl, imidazolidinyl, isothiazolidinyl, indolyl,isoindolyl, indolinyl, isoindolinyl, indanyl, indolizinyl, isoxazolyl,isoxazolidinyl, morpholinyl, naphthyridinyl, oxadiazolyl,octahydroindolyl, octahydroisoindolyl, 2-oxopiperazinyl,2-oxopiperidinyl, 2-oxopyrrolidinyl, 2-oxoazepinyl, oxazolyl,oxazolidinyl, oxiranyl, piperidinyl, piperazinyl, 4-piperidonyl,phenazinyl, phenothiazinyl, phenoxazinyl, phthalazinyl, pteridinyl,purinyl, pyrrolyl, pyrrolidinyl, pyrazolyl, pyrazolidinyl, pyridinyl,pyrazinyl, pyrimidinyl, pyridazinyl, quinazolinyl, quinoxalinyl,quinolinyl, quinuclidinyl, isoquinolinyl, thiazolyl, thiazolidinyl,thiadiazolyl, triazolyl, tetrazolyl, tetrahydrofuryl, triazinyl,tetrahydropyranyl, thienyl, thiamorpholinyl, thiamorpholinyl sulfoxide,and thiamorpholinyl sulfone. Unless stated otherwise specifically in thespecification, the term “heterocyclyl” is meant to include heterocyclylradicals as defined above which are optionally substituted by one ormore substituents selected from the group consisting of hydroxy, halo,alkyl, alkoxy, phenoxy, haloalkyl, haloalkoxy, formyl, nitro, cyano,amino, monoalkylamino, dialkylamino, carboxy, alkoxycarbonyl,benzylcarbonyl, alkylcarbonyl, carboxyalkyl, alkoxycarbonylalkyl,aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl,aminocarbonylalkyl, monoalkylaminocarbonylalkyl,dialkylaminocarbonylalkyl, as defined herein.

For R¹, preferred heterocyclyl radicals are those radicals selected fromthe group consisting of benzoxazolyl, benzthiazolyl, pyridinyl, andpyrimidinyl. For R³, preferred heterocyclyl radicals are those radicalsselected from the group consisting of morpholinyl, piperidinyl(optionally substituted by one or more substituents selected from thegroup consisting of aminocarbonyl, alkoxycarbonyl, carboxy and hydroxy),pyrrolidinyl (optionally substituted by hydroxy), and piperazinyl(optionally substituted by one or more substituents selected from thegroup consisting of alkyl and carboxyalkyl).

“Heterocyclylalkyl” refers to a radical of the formula —R_(a)—R_(h)where R_(a) is an alkyl radical as defined above and R_(h) is anheterocyclyl radical as defined above, e.g., imidazol-3-ylmethyl,triazol-3-ylmethyl, 2-tetrazolylethyl, and the like. For R², preferredheterocyclylalkylradicals are those radicals where R_(h) is selectedfrom the group consisting of imidazolyl (optionally substituted bycarboxyalkyl), indolyl, triazolyl and tetrazolyl.

“Heterocyclylalkoxy” refers to a radical of the formula —O—R_(a)—R_(h)where R_(a) is an alkyl radical as defined above and R_(h) is anheterocyclyl radical as defined above, e.g., 1-tetrazolylethoxy,oxiranylmethoxy, and the like. For R³, preferred heterocyclylalkoxyradicals are those radicals where R_(h) is selected from the groupconsisting of oxiranyl or tetrazolyl. For R⁴, preferredheterocyclylalkoxy radicals are those radicals where R_(h) ispyrrolidinyl (optionally substituted by one or more substituentsindependently selected from the group consisting of hydroxy andcarboxy).

“Heterocyclylcarbonyl” refers to a radical of the formula —C(O)—R_(h)where R_(h) is a heterocyclyl radical as defined above, e.g.,furan-2-ylcarbonyl, piperidin-4-ylcarbonyl, thien-2-ylcarbonyl,morpholin-4-ylcarbonyl, and the like. For R¹, preferredheterocyclylcarbonyl radicals are those radicals wherein R_(h) isselected from the group consisting of furanyl, thienyl, piperidinyl,morpholinyl and pyridinyl (optionally substituted by one or moresubstitutents independently selected from the group consisting ofhydroxy, halo and alkyl).

“Monoalkylamino” refers to a radical of the formula —N(H)—R_(a) whereR_(a) is an alkyl radical as defined above, e.g., methylamino,ethylamino, n-propylamino, and the like.

“Monoalkylaminocarbonyl” refers to a radical of the formula—C(O)—N(H)—R_(a) where R_(a) is an alkyl radical as defined above, e.g.,methylaminocarbonyl, ethylaminocarbonyl, n-propylaminocarbonyl, and thelike.

“Monoaralkylaminocarbonylalkoxy” refers to a radical of the formula—O—R_(a)—C(O)—N(H)—R_(e) where R_(a) is an alkyl radical as definedabove and R_(e) is an aralkyl radical as defined above, e.g.,benzylaminocarbonylmethoxy, 2-(benzylaminocarbonyl)ethoxy,2-(4-hydroxybenzylaminocarbonyl)propoxy, and the like.

“Mono(carboxyalkyl)aminocarbonyl” refers to a radical of the formula—C(O)—N(H)—R_(a)—C(O)OH where R_(a) is an alkyl radical as definedabove, e.g., (2-carboxyethyl)aminocarbonyl, carboxymethylaminocarbonyl,and the like.

“Mono(carboxyalkyl)aminocarbonylalkoxy” refers to a radical of theformula —O—R_(a)—C(O)—N(H)—R_(a)—C(O)OH where each R_(a) isindependently an alkyl radical as defined above, e.g.,(2-carboxyethyl)aminocarbonylmethoxy,2-(carboxymethylaminocarbonyl)propoxy, and the like.

“Mono(alkoxycarbonylalkyl)aminocarbonylalkoxy” refers to a radical ofthe formula —O—R_(a)—C(O)—N(H)—R_(a)—C(O)OR_(a) where each R_(a) isindependently an alkyl radical as defined above, e.g.,(2-ethoxycarbonylethyl)aminocarbonylmethoxy,2-(ethoxycarbonylmethylaminocarbonyl)propoxy, and the like.

“Mono(alkoxycarbonylalkyl)aminocarbonyl” refers to a radical of theformula —C(O)—N(H)—R_(a)—C(O)OR_(a) where each R_(a) is independently analkyl radical as defined above, e.g.,(2-methoxycarbonylethyl)aminocarbonyl,ethoxycarbonylmethylaminocarbonyl, and the like.

“Mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl” refers to a radicalof the formula —C(O)—N(H)—R_(a)(C(O)OH)—C(O)OR_(a) where each R_(a) isindependently an alkyl radical as defined above, e.g.,(1-carboxy-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl, and thelike.

“Mono(di(alkoxycarbonyl)alkyl)aminocarbonyl” refers to a radical of theformula —C(O)—N(H)—R_(a)(C(O)OR_(a))—C(O)OR_(a) where each R_(a) isindependently an alkyl radical as defined above, e.g.,(1-methoxycarbonyl-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl,and the like.

“Mono(dicarboxyalkyl)aminocarbonyl” refers to a radical of the formula—C(O)—N(H)—R_(a)(C(O)OH)—C(O)OH where R_(a) is an alkyl radical asdefined above, e.g., (1,3-dicarboxypropyl)aminocarbonyl, and the like.

“Mammal” includes humans and domesticated animals, such as cats, dogs,swine, cattle, sheep, goats, horses, rabbits, and the like.

“Nitro” refers to the —NO₂ radical.

“Optional” or “optionally” means that the subsequently described eventof circumstances may or may not occur, and that the description includesinstances where said event or circumstance occurs and instances in whichit does not. For example, “optionally substituted aryl” means that thearyl radical may or may not be substituted and that the descriptionincludes both substituted aryl radicals and aryl radicals having nosubstitution.

“Pharmaceutically acceptable salt” includes both acid and base additionsalts.

“Pharmaceutically acceptable acid addition salt” refers to those saltswhich retain the biological effectiveness and properties of the freebases, which are not biologically or otherwise undesirable, and whichare formed with inorganic acids such as hydrochloric acid, hydrobromicacid, sulfuric acid, nitric acid, phosphoric acid and the like, andorganic acids such as acetic acid, trifluoroacetic acid, propionic acid,glycolic acid, pyruvic acid, oxalic acid, maleic acid, malonic acid,succinic acid, fumaric acid, tartaric acid, citric acid, benzoic acid,cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid,p-toluenesulfonic acid, salicylic acid, and the like.

“Pharmaceutically acceptable base addition salt” refers to those saltswhich retain the biological effectiveness and properties of the freeacids, which are not biologically or otherwise undesirable. These saltsare prepared from addition of an inorganic base or an organic base tothe free acid. Salts derived from inorganic bases include, but are notlimited to, the sodium, potassium, lithium, ammonium, calcium,magnesium, iron, zinc, copper, manganese, aluminum salts and the like.Preferred inorganic salts are the ammonium, sodium, potassium, calcium,and magnesium salts. Salts derived from organic bases include, but arenot limited to, salts of primary, secondary, and tertiary amines,substituted amines including naturally occurring substituted amines,cyclic amines and basic ion exchange resins, such as isopropylamine,trimethylamine, diethylamine, triethylamine, tripropylamine,ethanolamine, 2-dimethylaminoethanol, 2-diethylaminoethanol,dicyclohexylamine, lysine, arginine, histidine, caffeine, procaine,hydrabamine, choline, betaine, ethylenediamine, glucosamine,methylglucamine, theobromine, purines, piperazine, piperidine,N-ethylpiperidine, polyamine resins and the like. Particularly preferredorganic bases are isopropylamine, diethylamine, ethanolamine,trimethylamine, dicyclohexylamine, choline and caffeine.

As used herein, compounds which are “commercially available” may beobtained from standard commercial sources including Acros Organics(Pittsburgh Pa.), Aldrich Chemical (Milwaukee Wis., including SigmaChemical and Fluka), Apin Chemicals Ltd. (Milton Park UK), AvocadoResearch (Lancashire U.K.), BDH Inc. (Toronto, Canada), Bionet(Cornwall, U.K.), Chemservice Inc. (West Chester Pa.), Crescent ChemicalCo. (Hauppauge N.Y.), Eastman Organic Chemicals, Eastman Kodak Company(Rochester N.Y.), Fisher Scientific Co. (Pittsburgh Pa.), FisonsChemicals (Leicestershire UK), Frontier Scientific (Logan Utah), ICNBiomedicals, Inc. (Costa Mesa Calif.), Key Organics (Cornwall U.K.),Lancaster Synthesis (Windham N.H.), Maybridge Chemical Co. Ltd.(Cornwall U.K.), Parish Chemical Co. (Orem Utah), Pfaltz & Bauer, Inc.(Waterbury Conn.), Polyorganix (Houston Tex.), Pierce Chemical Co.(Rockford Ill.), Riedel de Haen A G (Hannover, Germany), SpectrumQuality Product, Inc. (New Brunswick, N.J.), TCI America (PortlandOreg.), Trans World Chemicals, Inc. (Rockville Md.), and Wako ChemicalsUSA, Inc. (Richmond Va.).

As used herein, “suitable conditions” for carrying out a synthetic stepare explicitly provided herein or may be discerned by reference topublications directed to methods used in synthetic organic chemistry.The reference books and treatise set forth above that detail thesynthesis of reactants useful in the preparation of compounds of thepresent invention, will also provide suitable conditions for carryingout a synthetic step according to the present invention.

As used herein, “methods known to one of ordinary skill in the art” maybe identified though various reference books and databases. Suitablereference books and treatise that detail the synthesis of reactantsuseful in the preparation of compounds of the present invention, orprovide references to articles that describe the preparation, includefor example, “Synthetic Organic Chemistry”, John Wiley & Sons, Inc., NewYork; S. R. Sandier et al., “Organic Functional Group Preparations,” 2ndEd., Academic Press, New York, 1983; H, O. House, “Modern SyntheticReactions”, 2nd Ed., W. A. Benjamin, Inc. Menlo Park, Calif. 1972; T. L.Gilchrist, “Heterocyclic Chemistry”, 2nd Ed., John Wiley & Sons, NewYork, 1992; J. March, “Advanced Organic Chemistry: Reactions, Mechanismsand Structure”, 4th Ed., Wiley-Interscience, New York, 1992. Specificand analogous reactants may also be identified through the indices ofknown chemicals prepared by the Chemical Abstract Service of theAmerican Chemical Society, which are available in most public anduniversity libraries, as well as through on-line databases (the AmericanChemical Society, Washington, D.C., www.acs.org may be contacted formore details). Chemicals that are known but not commercially availablein catalogs may be prepared by custom chemical synthesis houses, wheremany of the standard chemical supply houses (e.g., those listed above)provide custom synthesis services.

“Prodrugs” is meant to indicate a compound that may be converted underphysiological conditions or by solvolysis to a biologically activecompound of the invention. Thus, the term “prodrug” refers to ametabolic precursor of a compound of the invention that ispharmaceutically acceptable. A prodrug may be inactive when administeredto a subject in need thereof, but is converted in vivo to an activecompound of the invention. Prodrugs are typically rapidly transformed invivo to yield the parent compound of the invention, for example, byhydrolysis in blood. The prodrug compound often offers advantages ofsolubility, tissue compatibility or delayed release in a mammalianorganism (see, Bundgard, H., Design of Prodrugs (1985), pp. 7-9, 21-24(Elsevier, Amsterdam).

A discussion of prodrugs is provided in Higuchi, T., et al., “Pro-drugsas Novel Delivery Systems,” A.C.S. Symposium Series, Vol. 14, and inBioreversible Carriers in Drug Design, ed. Edward B. Roche, AmericanPharmaceutical Association and Pergamon Press, 1987, both of which areincorporated in full by reference herein.

The term “prodrug” is also meant to include any covalently bondedcarriers which release the active compound of the invention in vivo whensuch prodrug is administered to a mammalian subject. Prodrugs of acompound of the invention may be prepared by modifying functional groupspresent in the compound of the invention in such a way that themodifications are cleaved, either in routine manipulation or in vivo, tothe parent compound of the invention. Prodrugs include compounds of theinvention wherein a hydroxy, amino or mercapto group is bonded to anygroup that, when the prodrug of the compound of the invention isadministered to a mammalian subject, cleaves to form a free hydroxy,free amino or free mercapto group, respectively. Examples of prodrugsinclude, but are not limited to, acetate, formate and benzoatederivatives of alcohol and amine functional groups in the compounds ofthe invention and the like.

“Stable compound” and “stable structure” are meant to indicate acompound that is sufficiently robust to survive isolation to a usefuldegree of purity from a reaction mixture, and formulation into anefficacious therapeutic agent.

“Therapeutically effective amount” refers to that amount of a compoundof the invention which, when administered to a human in need thereof, issufficient to effect treatment, as defined below, for a disease-statecharacterized by thrombotic activity. The amount of a compound of theinvention which constitutes a “therapeutically effective amount” willvary depending on the compound, the condition and its severity, and theage of the human to be treated, but can be determined routinely by oneof ordinary skill in the art having regard to his own knowledge and tothis disclosure.

“Treating” or “treatment” as used herein covers the treatment of adisease-state in a mammal, preferably a human, which disease-stated ischaracterized by thrombotic activity, and includes:

-   -   (i) preventing the condition from occurring in a human, in        particular, when such human is predisposed to the condition but        has not yet been diagnosed as having it;    -   (ii) inhibiting the condition, i.e., arresting its development;        or    -   (iii) relieving the condition, i.e., causing regression of the        condition.

In the above definitions, the use of parentheses in a formula is used toconserve space. Accordingly, the use of parenthesis in a formulaindicates that the group enclosed within the parentheses is attacheddirectly to the atom preceding the parenthesis. For example, the term“di(carboxy)alkoxy” is defined as a radical of the formula—O—R_(a)(C(O)OH)—C(O)OH. This formula can be drawn as follows:

It will also be appreciated that certain compounds of the invention orpharmaceutically acceptable salts thereof, may exist in, and be isolatedin, isomeric forms, including tautomeric forms, cis- or trans-isomers.In addition, certain compounds of the invention or pharmaceuticallyacceptable salts thereof may contain one or more asymmetric centers andmay thus give rise to enantiomers, diastereomers, and otherstereoisomeric forms that may be defined, in terms of absolutestereochemistry, such as (R)- or (S)-. The present invention is meant toinclude all such possible isomers, as well as their racemic andoptically pure forms. Optically active (R)- and (S)- isomers may beprepared using chiral synthons or chiral reagents by methods known tothose of ordinary skill in the art, or resolved using conventionaltechniques. When the compounds described herein contain olefinic doublebonds or other centers of geometric asymmetry, and unless specifiedotherwise, it is intended that the compounds include both E and Zgeometric isomers.

The nomenclature used herein is a modified form of the I.U.P.A.C.nomenclature system wherein the compounds of the invention are namedherein as derivatives of the quinoline or naphthalene moiety.

is named herein as2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-amino-4-(1-carboxycyclobut-1-oxy)quinoline.Unless otherwise indicated, compound names are intended to include anysingle stereoisomer, enantiomer, diastereomer, racemate or mixturesthereof.Utility of the Compounds of the Invention

The compounds of the invention act as selective antagonists of theplatelet ADP receptor, P2Y_(AC). Accordingly, the compounds are usefulin treating disease-states which are characterized as having thromboticactivity. In particular, the compounds are useful as inhibitors ofplatelet activation, aggregation and degranulation, anti-thromboticagents or in the treatment or prophylaxis of unstable angina, coronaryangioplasty (PTCA), myocardial infarction, perithrombolysis, primaryarterial thrombotic I complications of atherosclerosis such asthrombotic or embolic stroke, peripheral vascular disease, myocardialinfarction with or without thrombolysis, arterial complications due tointerventions in atherosclerotic disease such as angioplasty,endarterectomy, stent placement, coronary and other vascular graftsurgery, thrombotic complications of surgical or mechanical damage suchas tissue salvage following accidental or surgical trauma,reconstructive surgery including skin and muscle flaps, conditions witha diffuse thrombotic/platelet consumption component such as disseminatedintravascular coagulation, thrombotic thrombocytopenic purpura,hemolytic uremic syndrome, thrombotic complications of septicernia,adult respiratory distress syndrome, anti-phospholipid syndrome,heparin-induced thrombocytopaenia and pre-eclampsia/eclampsia, or venousthrombosis such as deep vein thrombosis, venoocclusive disease,hematological conditions such as myeloproliferative disease, includingthrombocythemia; or in the prevention of mechanically-induced plateletactivation in vivo, such as cardiopulmonary bypass (prevention ofmicrothromboembolism), mechanically-induced platelet activation invitro, such as use in the preservation of blood products, e.g. plateletconcentrates, or shunt occlusion such as in renal dialysis andplasmapheresis, thrombosis secondary to vascular damage/inflammationsuch as vasculitis, arteritis, glomerulonephritis, inflammatory boweldisease and organ graft rejection, conditions such as migraine,Raynaud's phenomenon, atheromatous plaque formation/progression,vascular stenosis/restenosis and asthma, in which platelet-derivedfactors are implicated in the disease process.

The compounds of formula (I) are also useful as standard or referencecompounds, for example, as a quality standard or control, in tests orassays involving the inhibition of the platelet ADP receptor, P2Y_(AC).Such compounds may be provided in a commercial kit, for example, for usein pharmaceutical research involving the platelet ADP receptor,P2Y_(AC). For example, a compound of formula (I) could be used as areference in an assay to compare its known activity to a compound withan unknown activity. This would ensure that the experimenter that theassay was being performed properly and provide a basis for comparison,especially if the test compound was a derivative of the referencecompound. When developing new assays or protocols, compounds of formula(I) could be used to test their effectiveness.

Testing of the Compounds of the Invention

The ability of the compounds to inhibit the platelet adenosinediphosphate receptor known as the P2Y_(AC) receptor, and its biologicaleffects may be tested in a variety of in vitro, ex vivo and in vivoassays. For example, the ability of the compounds to bind to theP2Y_(AC) receptor may be measured by methods similar to those describedin Gachet, C. et al., Br. J. Haemotol. (1995), Vol. 91, pp.434-444 andMills, D. C. B., Thromb. Haemost (1996), Vol. 76, No. 6, pp. 835-856,and by the method described below in Example 17. The ability of thecompounds to inhibit ADP-induced aggregation of platelets may bemeasured by methods similar to those described in R. G. Humphries, Br.J. Pharm. (1995), Vol. 115, pp. 1110-1116 and Methods in Enzymology,Vol. 169, p. 3 and by the method described below in Example 18. Theability of the compounds to inhibit thrombus formation in vivo or exvivo may be measured by methods similar to those described in J. M.Herbert, Cardiovasc. Drug Reviews (1993), Vol. 11, No. 2, pp. 180-198 orJ. D. Folts, Circulation (1976), Vol. 54, No. 3, p. 365, or by themethods described below in Example 19. The results of these assaysclearly demonstrate that the compounds of the invention are functionalantagonists of the platelet adenosine diphosphate receptor and arethereful useful in inhibiting platelet aggregation and thrombusformation.

Administration of the Compounds of the Invention

Administration of the compounds of the invention, or theirpharmaceutically acceptable salts, in pure form or in an appropriatepharmaceutical composition, can be carried out via any of the acceptedmodes of administration or agents for serving similar utilities. Thus,administration can be, for example, orally, nasally, parenterally,topically, transdermally, or rectally, in the form of solid, semi-solid,lyophilized powder, or liquid dosage forms, such as for example,tablets, suppositories, pills, soft elastic and hard gelatin capsules,powders, solutions, suspensions, or aerosols, or the like, preferably inunit dosage forms suitable for simple administration of precise dosages.The compositions will include a conventional pharmaceutical carrier orexcipient and a compound of the invention as the/an active agent, and,in addition, may include other medicinal agents, pharmaceutical agents,carriers, adjuvants, etc.

Generally, depending on the intended mode of administration, thepharmaceutically acceptable compositions will contain about 1% to about99% by weight of a compound(s) of the invention, or a pharmaceuticallyacceptable salt thereof, and 99% to 1% by weight of a suitablepharmaceutical excipient. Preferably, the composition will be about 5%to 75% by weight of a compound(s) of the invention, or apharmaceutically acceptable salt thereof, with the rest being suitablepharmaceutical excipients.

The preferred route of administration is oral, using a convenient dailydosage regimen which can be adjusted according to the degree of severityof the disease-state to be treated. For such oral administration, apharmaceutically acceptable composition containing a compound(s) of theinvention, or a pharmaceutically acceptable salt thereof, is formed bythe incorporation of any of the normally employed excipients, such as,for example, pharmaceutical grades of mannitol, lactose, starch,pregelatinized starch, magnesium stearate, sodium saccharine, talcum,cellulose ether derivatives, glucose, gelatin, sucrose, citrate, propylgallate, and the like. Such compositions take the form of solutions,suspensions, tablets, pills, capsules, powders, sustained releaseformulations and the like.

Preferably such compositions will take the form of capsule, caplet ortablet and therefore will also contain a diluent such as lactose,sucrose, dicalcium phosphate, and the like; a disintegrant such ascroscarmellose sodium or derivatives thereof; a lubricant such asmagnesium stearate and the like; and a binder such as a starch, gumacacia, polyvinylpyrrolidone, gelatin, cellulose ether derivatives, andthe like.

The compounds of the invention, or their pharmaceutically acceptablesalts, may also be formulated into a suppository using, for example,about 0.5% to about 50% active ingredient disposed in a carrier thatslowly dissolves within the body, e.g., polyoxyethylene glycols andpolyethylene glycols (PEG), e.g., PEG 1000 (96%) and PEG 4000 (4%).

Liquid pharmaceutically administrable compositions can, for example, beprepared by dissolving, dispersing, etc., a compound(s) of the invention(about 0.5% to about 20%), or a pharmaceutically acceptable saltthereof, and optional pharmaceutical adjuvants in a carrier, such as,for example, water, saline, aqueous dextrose, glycerol, ethanol and thelike, to thereby form a solution or suspension.

If desired, a pharmaceutical composition of the invention may alsocontain minor amounts of auxiliary substances such as wetting oremulsifying agents, pH buffering agents, antioxidants, and the like,such as, for example, citric acid, sorbitan monolaurate, triethanolamineoleate, butylated hydroxytoluene, etc.

Actual methods of preparing such dosage forms are known, or will beapparent, to those skilled in this art; for example, see Remington'sPharmaceutical Sciences, 18th Ed., (Mack Publishing Company, Easton,Pa., 1990). The composition to be administered will, in any event,contain a therapeutically effective amount of a compound of theinvention, or a pharmaceutically acceptable salt thereof, for treatmentof a disease-state characterized by thrombotic activity in accordancewith the teachings of this invention.

The compounds of the invention, or their pharmaceutically acceptablesalts, are administered in a therapeutically effective amount which willvary depending upon a variety of factors including the activity of thespecific compound employed; the metabolic stability and length of actionof the compound; the age, body weight, general health, sex, and diet ofthe patient; the mode and time of administration; the rate of excretion;the drug combination; the severity of the particular disease-states; andthe host undergoing therapy. Generally, a therapeutically effectivedaily dose is from about 0.14 mg to about 14.3 mg/kg of body weight perday of a compound of the invention, or a pharmaceutically acceptablesalt thereof; preferably, from about 0.7 mg to about 10 mg/kg of bodyweight per day; and most preferably, from about 1.4 mg to about 7.2mg/kg of body weight per day. For example, for administration to a 70 kgperson, the dosage range would be from about 10 mg to about 1.0 gram perday of a compound of the invention, or a pharmaceutically acceptablesalt thereof, preferably from about 50 mg to about 700 mg per day, andmost preferably from about 100 mg to about 500 mg per day.

Preferred Embodiments

Of the compounds of formula (I) as set forth above in the Summary of theInvention, several groups of compounds are particularly preferred.

One preferred group is that group of compounds wherein:

-   a is 1 or 2;-   b is 1;-   A is ═N—;-   R¹ is alkoxycarbonyl;-   R² is carboxyalkyl, alkoxycarbonylalkyl, carboxyalkoxycarbonylalkyl    or heterocyclylalkyl;-   R³ is alkoxy, alkoxycarbonylalkoxy, alkoxycarbonylcycloalkoxy,    carboxyalkoxy, carboxycycloalkoxy, aminocarbonylcycloalkoxy,    heterocyclyl, tetrahydrofuranonyloxy or heterocyclylalkoxy;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy,    hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl,    alkylcarbonyl, nitro, amino, monoalkylamino, dialkylamino,    carboxyalkylamino, alkylcarbonylamino, di(alkylcarbonyl)amino,    hydroxyalkyl, dialkylaminoalkyl, carboxyalkoxy,    alkoxycarbonylalkoxy, dialkylaminoalkoxy, and heterocyclylalkoxy;-   R⁵ is hydrogen, alkyl or hydroxalkyl;-   R is —N(R⁷)—C(O)—; and-   R⁷ is hydrogen or alkyl.

A preferred subgroup of this group of compounds is that subgroup ofcompounds wherein:

-   a is 1 or 2;-   b is 1;-   A is ═N—;-   R¹ is alkoxycarbonyl;-   R² is carboxyalkyl, alkoxycarbonylalkyl or heterocyclylalkyl;-   R³ is alkoxy, alkoxycarbonylcycloalkoxy, carboxycycloalkoxy,    tetrahydrofuranonyloxy, aminocarbonylcycloalkoxy, heterocyclyl, or    heterocyclylalkoxy;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl and heterocyclylalkoxy;-   R⁵ is hydrogen, alkyl or hydroxyalkyl;-   R⁶ is —N(R⁷)—C(O)—; and-   R⁷ is hydrogen.

A preferred class of this subgroup of compounds is that class ofcompounds wherein R² is carboxyalkyl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(oxiranyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(morpholin-4-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-tetrazol-5-ylethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(tetrazol-5-yl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-aminocarbonylpiperidin-1-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-carboxypiperidin-1-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-ethoxycarbonylpiperidin-1-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-methylpiperazin-1-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-hydroxypyrrolidin-1-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-hydroxypiperidin-1-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-(carboxymethyl)piperazin-1-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-(carboxymethyl)piperazin-1-yl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(2-carboxy-4-hydroxypyrrolidin-1-yl)ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(tetrazol-5-yl)methoxyquinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-tetrazol-5-ylethoxy)quinoline.

Particularly preferred of these preferred compounds is2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-tetrazol-5-ylethoxy)quinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein R² is alkoxycarbonylalkyl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(tetrahydro-2-oxofuran-3-yl)oxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(oxiranyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3-ethoxycarbonylpiperidin-1-yl)quinoline;    and;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-4-(1-tetrazol-5-ylethoxy)quinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein R² is heterocyclylalkyl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(imidazol-4-yl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(indol-3-yl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(1-(carboxymethyl)imidazol-4-yl)ethyl]-aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(1,2,4-triazol-3-yl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(tetrazol-5-yl)ethyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline.

Particularly preferred of these preferred compounds are the followingcompounds:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(tetrazol-5-yl)ethyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline.

Another preferred subgroup of this group of compounds is that subgroupof compounds wherein:

-   a is 1 or 2;-   b is 1;-   A is ═N—;-   R¹ is alkoxycarbonyl;-   R² is carboxyalkyl, carboxyalkoxycarbonylalkyl or    alkoxycarbonylalkyl;-   R³ is alkoxy, alkoxycarbonylalkoxy, alkoxycarbonylcycloalkoxy,    aminocarbonylcycloalkoxy, carboxyalkoxy or carboxycycloalkoxy;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy,    hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl,    alkylcarbonyl, nitro, amino, monoalkylamino, dialkylamino,    carboxyalkylamino, alkylcarbonylamino, di(alkylcarbonyl)amino,    hydroxyalkyl, dialkylaminoalkyl, carboxyalkoxy,    alkoxycarbonylalkoxy, and dialkylaminoalkoxy;-   R⁵ is hydrogen, alkyl or hydroxyalkyl;-   R⁶ is —N(R⁷)—C(O)—; and-   R⁷ is hydrogen or alkyl.

A preferred class of this subgroup of compounds is that class ofcompounds wherein:

-   R³ is alkoxycarbonylalkoxy;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl or halo; and-   R⁵ is hydrogen.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(methoxycarbonyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-dimethylethoxycarbonylpropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)-2-methylpropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(methoxycarbonyl)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)propoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)-2-methylpropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline.

Particularly preferred of these preferred compounds are the followingcompounds:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)propoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)-2-methylpropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein:

-   R³ is alkoxycarbonylcycloalkoxy or aminocarbonylcycloalkoxy; and-   R⁵ is hydrogen.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-(benzyloxy)-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-hydroxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-(aminocarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-fluoro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-fluoro-6-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(1-methylethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dichloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methylthio-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(methoxycarbonyl)cyclobut-1-oxy)quinoline.

Particularly preferred of these preferred compounds are the followingcompounds:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dichloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein:

-   R³ is carboxyalkoxycarbonylalkyl or carboxyalkoxy; and-   R⁵ is hydrogen.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((carboxy)methoxycarbonyl)propyl]aminocarbonyl-4-(carboxy)methoxyquinoline-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxy)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-methyl-1-carboxyethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxy-2,2-dimethylpropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxyethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(carboxy)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(carboxy)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(carboxy)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxypropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxy-2-methylpropoxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline.

Particularly preferred of these preferred compounds are the followingcompounds:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(carboxy)ethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxypropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxy-2-methylpropoxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein:

-   R³ is carboxycycloalkoxy; and-   R⁵ is hydrogen.

A preferred subclass of this class of compounds is that subclass ofcompounds wherein each R⁴ is independently selected from the groupconsisting of alkyl, hydroxyalkyl, alkoxy, halo, haloalkyl, anddialkylaminoalkyl.

Preferred compounds of this subclass of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-8-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(diethylamino)methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(diethylamino)methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(trifluoromethyl)-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(hydroxymethyl)-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-ethyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-ethyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-bromo-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-difluoro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-fluoro-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)    quinoline; and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline.

Particularly preferred of these preferred compounds are the followingcompounds:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-1-carboxycyclobut-1-oxy)    quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline.

Another preferred subclass of this class of compounds is that subclassof compounds wherein each R⁴ is independently selected from the groupconsisting of cyano, nitro, amino, monoalkylamino, and dialkylamino.

Preferred compounds of this subclass of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-nitro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-amino-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-cyano-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-cyano-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-nitro-4-(1-carboxycyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-amino-4-(1-carboxycyclobut-1-oxy)quinoline.

Another preferred subclass of this class of compounds is that subclassof compounds wherein each R⁴ is independently selected from the groupconsisting of alkoxy, aralkoxy, haloalkoxy, hydroxy, alkylthio,carboxyalkoxy, alkoxycarbonylalkoxy and dialkylaminoalkoxy.

Preferred compounds of this subclass of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(benzyloxy)-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-n-propoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(carboxy)methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(diethylamino)ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(benzyloxy)-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(carboxy)methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(1-methylethoxy)-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(trifluoromethoxy)-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-trifluoromethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methylthio-4-(1-carboxycyclobut-1-oxy)quinoline.

Another preferred subclass of this class of compounds is that subclassof compounds wherein each R⁴ is independently selected from the groupconsisting of hydrogen, carboxy, alkoxycarbonyl, aminocarbonyl andalkylcarbonyl.

Preferred compounds of this subclass of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxybutyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-carboxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-acetyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-ethoxycarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-acetyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-carboxy-4-(1-carboxycyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein:

-   R³ is alkoxy; and-   R⁵ is hydrogen.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-4-(1,1-dimethylethoxy)carbonylbutyl]-aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-4-carboxybutyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-ethoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-((1,1-dimethylethoxy)carbonyl)ethyl]-aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl][methyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-((1,1-dimethylethoxy)carbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-(methoxycarbonyl)pentyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-(carboxy)pentyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-methoxyquinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-methoxyquinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein:

-   R³ is alkoxy; and-   R⁵ is alkyl or hydroxyalkyl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(1-methylethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(2-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(2-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(1-methylethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(1-hydroxyethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[1-(3-(1-hydroxyethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline.

Another preferred group of compounds of formula (I) as set forth abovein the Summary of the Invention is that group of compounds wherein:

-   a is 1 or 2;-   b is 1;-   A is ═N—;-   R¹ is hydrogen, alkyl, carboxyalkyl, aryl, aralkyl, alkylcarbonyl,    alkoxyalkoxyalkylcarbonyl, aryloxyalkylcarbonyl,    carboxyalkylcarbonyl, alkoxycarbonylalkylcarbonyl,    alkoxycarbonylalkyl, arylcarbonyl, aryloxycarbonyl,    aralkoxycarbonyl, cycloalkylcarbonyl, haloalkoxycarbonyl,    aminocarbonyl, monoalkylaminocarbonyl, alkoxycarbonylaminocarbonyl,    alkylsulfonyl, arylsulfonyl, heterocyclyl, or heterocyclylcarbonyl;-   R² is hydrogen, alkyl, aryl, aralkyl, alkylsulfonylalkyl,    aralkoxyalkyl, hydroxyalkyl, aminoalkyl,    haloalkylsulfonylaminoalkyl, carboxyalkylthioalkyl,    alkoxycarbonylalkylthioalkyl, carboxyalkyl, (carboxy)(hydroxy)alkyl,    carboxyalkoxyalkyl, alkoxycarbonylalkyl, aralkoxycarbonylalkyl,    carboxyalkoxycarbonylalkyl, alkoxycarbonylalkoxycarbonylalkyl,    aminocarbonylalkyl, aralkoxycarbonylaminoalkyl,    alkoxycarbonylalkylaminocarbonylalkyl,    carboxyalkylaminocarbonylalkyl,    (alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl, and    (carboxyalkyl)(alkyl)aminocarbonylalkyl;-   R³ is hydrogen, alkyl, hydroxy, halo, carboxyalkenyl, alkoxy,    alkoxycarbonyl, alkoxycarbonylalkoxy, di(alkoxycarbonyl)alkoxy,    carboxyalkoxy, di(carboxy)alkoxy, (carboxy)(hydroxy)alkoxy,    (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy, cyanoalkoxy,    haloalkoxy, haloalkenyloxy, carboxyalkenyloxy,    alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,    (cycloalkyl)(carboxy)alkoxy, alkylthio, carboxy,    (dialkylaminocarbonylalkyl)(alkyl)amino, (carboxyalkyl)(alkyl)amino,    (hydroxyalkyl)(alkyl)amino, (dialkylaminoalkyl)(alkyl)amino,    carboxyalkylamino, mono(alkoxycarbonylalkyl)aminocarbonyl,    mono(carboxyalkyl)aminocarbonyl,    mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,    mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,    mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,    dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,    mono(carboxyalkyl)aminocarbonylalkoxy,    mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,    alkoxycarbonylcycloalkoxy, and aminocarbonylcycloalkoxy;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy,    hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl,    alkylcarbonyl, nitro, amino, monoalkylamino, dialkylamino,    carboxyalkylamino, alkylcarbonylamino, di(alkylcarbonyl)amino,    hydroxyalkyl, dialkylaminoalkyl, carboxyalkoxy,    alkoxycarbonylalkoxy, dialkylaminoalkoxy, or heterocyclylalkoxy;-   each R⁵ is independently selected from the group consisting of    hydrogen, alkyl, hydroxyalkyl, aralkyl, carboxy, alkoxycarbonyl,    aralkoxycarbonyl, carboxyalkyl, or alkoxycarbonylalkyl;-   R⁶ is —N(R⁷)—C(O)—; and-   R⁷ is hydrogen, alkyl, carboxyalkyl, or alkoxycarbonylalkyl.

A preferred subgroup of this group of compounds is that subgroup ofcompounds wherein:

-   R³ is hydrogen or alkoxy;-   each R⁴ is independently hydrogen, halo or carboxyalkylamino;-   R⁵ is hydrogen or alkyl; and-   R⁷ is hydrogen or alkyl.

A preferred class of this subgroup of compounds is that class ofcompounds wherein R¹ is hydrogen, alkyl, aralkyl, carboxyalkyl oralkoxycarbonylalkyl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[(piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2-methyl-4-(4-fluorobenzyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2-methyl-4-benzylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-benzylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-ethylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(1,1-dimethylethoxy)carbonylmethylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(carboxymethyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-methylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[1-(2-methyl-4-(benzyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein R¹ is aryl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[(4-(2-methyl-5-chlorophenyl)piperazin-1-yl)carbonyl    methyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(3-methyl    phenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(3-chlorophenyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(3-methylphenyl)-3-methylpiperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(3-chlorophenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-methyl-4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(3-chlorophenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(3-methyl-4-(3-methylphenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[(4-(3-methylphenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein R¹ is heterocyclyl or heterocyclylcarbonyl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(pyrimidin-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(benzoxazol-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(benzthiazol-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(pyrimidin-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    2-[1-(4-(benzoxazol-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    2-[11-(4-(benzthiazol-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    2-[(4-(2-hydroxy-3-chloropyridin-5-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(2-methylpropyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(1-methylethyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-benzyl-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(4-hydroxybenzyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(pyridin-2-yl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(pyridin-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(piperidin-4-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(furan-2-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(thien-2-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(morpholin-4-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[(4-(pyridin-2-yl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein R¹ is aminocarbonyl, monoalkylaminocarbonyl oralkoxycarbonylaminocarbonyl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(aminocarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(aminocarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-((1-methylethyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-((n-propyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-((n-butyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-((n-hexyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-((n-pentyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[(4-((ethoxycarbonyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.

Another preferred class of this subgroup of compounds is that class ofcompounds wherein R¹ is alkylcarbonyl, alkoxyalkoxyalkylcarbonyl,aryloxyalkylcarbonyl, carboxyalkylcarbonyl, alkoxycarbonylalkylcarbonyl,arylcarbonyl, aryloxycarbonyl, aralkoxycarbonyl, cycloalkylcarbonyl, orhaloalkoxycarbonyl.

Preferred compounds of this class of compounds are those compoundsselected from the group consisting of the following:

-   2-[(4-(trichloromethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(benzyloxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(1-chloroethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(phenoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2-carboxyethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(5-(ethoxycarbonyl)pentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(5-carboxypentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(4-acetamidophenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-((2-methoxyethoxy)methyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2-methoxycarbonylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(n-propylsulfonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2,5-dibromophenyl)sulfonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2,6-diflourophenyl)sulfonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(3-bromophenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(4-ethylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(4-n-propylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(4-n-butylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(phenoxymethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2,2-dimethylpropyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2-ethoxycarbonylethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(n-propyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(n-pentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2-phenylcyclopropyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2-bromo-5-methoxyphenyl)carbonylpiperazin-1,1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[(4-(n-butyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(3-trifluoromethoxyphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.

Another preferred group of compounds of formula (I) as set forth abovein the Summary of the Invention is that group of compounds wherein:

-   a is 1 or 2;-   b is 1;-   A is ═N—;-   R¹ is alkoxycarbonyl;-   R² is hydrogen, alkyl, aryl, aralkyl, alkylsulfonylalkyl,    aralkoxyalkyl, hydroxyalkyl, aminoalkyl,    haloalkylsulfonylaminoalkyl, carboxyalkylthioalkyl,    alkoxycarbonylalkylthioalkyl, (carboxy)(hydroxy)alkyl,    carboxyalkoxyalkyl, aralkoxycarbonylalkyl,    carboxyalkoxycarbonylalkyl, alkoxycarbonylalkoxycarbonylalkyl,    aminocarbonylalkyl, aralkoxycarbonylaminoalkyl,    alkoxycarbonylalkylaminocarbonylalkyl,    carboxyalkylaminocarbonylalkyl,    (alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl, or    (carboxyalkyl)(alkyl)aminocarbonylalkyl;-   R³ is hydrogen, alkyl, hydroxy, halo, carboxyalkenyl, alkoxy,    alkoxycarbonyl, alkoxycarbonylalkoxy, di(alkoxycarbonyl)alkoxy,    carboxyalkoxy, di(carboxy)alkoxy, (carboxy)(hydroxy)alkoxy,    (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy, cyanoalkoxy,    haloalkoxy, haloalkenyloxy, carboxyalkenyloxy,    alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,    (cycloalkyl)(carboxy)alkoxy, alkylthio, carboxy,    (dialkylaminocarbonylalkyl)(alkyl)amino, (carboxyalkyl)(alkyl)amino,    (hydroxyalkyl)(alkyl)amino, (dialkylaminoalkyl)(alkyl)amino,    carboxyalkylamino, mono(alkoxycarbonylalkyl)aminocarbonyl,    mono(carboxyalkyl)aminocarbonyl, mono    (di(alkoxycarbonyl)alkyl)aminocarbonyl,    mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,    mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,    dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,    mono(carboxyalkyl)aminocarbonylalkoxy,    mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,    alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy or    tetrahydrofuranonlyloxy;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy,    hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl,    alkylcarbonyl, nitro, amino, monoalkylamino, dialkylamino,    carboxyalkylamino, alkylcarbonylamino, di(alkylcarbonyl)amino,    hydroxyalkyl, dialkylaminoalkyl, carboxyalkoxy,    alkoxycarbonylalkoxy, dialkylaminoalkoxy, and heterocyclylalkoxy;-   each R⁵ is independently selected from the group consisting of    hydrogen, alkyl, hydroxyalkyl, aralkyl, carboxy, alkoxycarbonyl,    aralkoxycarbonyl, carboxyalkyl, and alkoxycarbonylalkyl;-   R⁶ is —N(R⁷)—C(O)—; and-   R⁷ is hydrogen, alkyl, carboxyalkyl, or alkoxycarbonylalkyl.

A preferred subgroup of this group of compounds is that subgroup ofcompounds wherein:

-   R² is hydrogen, alkyl, aryl, aralkyl, hydroxyalkyl,    haloalkylsulfonylaminoalkyl, or alkoxycarbonylalkoxycarbonylalkyl;    and-   R³ is alkyl, halo, carboxyalkenyl, alkoxycarbonyl,    alkoxycarbonylalkoxy, di(alkoxycarbonyl)alkoxy, carboxyalkoxy,    di(carboxy)alkoxy, (carboxy)(hydroxy)alkoxy,    (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy, cyanoalkoxy,    haloalkoxy, haloalkenyloxy, carboxyalkenyloxy,    alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,    (cycloalkyl)(carboxy)alkoxy, alkylthio, carboxy,    (dialkylaminocarbonylalkyl)(alkyl)amino, (carboxyalkyl)(alkyl)amino,    (hydroxyalkyl)(alkyl)amino, (dialkylaminoalkyl)(alkyl)amino,    carboxyalkylamino, mono(alkoxycarbonylalkyl)aminocarbonyl,    mono(carboxyalkyl)aminocarbonyl,    mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,    mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,    mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,    dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,    mono(carboxyalkyl)aminocarbonylalkoxy,    mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,    alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy, or    tetrahydrofuranonyloxy.

Preferred compounds of this subgroup of compounds are those compoundsselected from the group consisting of the following:

-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(ethoxycarbonyl)methoxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(carboxy)methoxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(aminocarbonyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(((1,1-dimethylethoxy)carbonyl)methoxy)-carbonylpropyl]aminocarbonyl-4-((1,1-dimethylethoxy)carbonyl)methoxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(ethoxycarbonyl)propoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-carboxypropoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(ethoxycarbonyl)prop-2-en-1-oxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(tetrahydro-2-oxofuran-3-yl)oxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-carboxy-3-hydroxypropoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1,1-di(ethoxycarbonyl)methoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1,1-di(carboxy)methoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-carboxyethoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(carboxy)prop-1-en-1-oxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(methoxycarbonyl)propoxy)quinoline;-   2-[1(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(carboxy)propoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-methyl-1-(carboxy)ethoxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(carboxy)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((trifluoromethyl)sulfonylamino)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((trifluoromethyl)sulfonylamino)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline.

Another preferred subgroup of this group of compounds is that subgroupof compounds wherein:

-   R² is alkylsulfonylalkyl, aralkoxyalkyl, aminoalkyl,    haloalkylsulfonylaminoalkyl, carboxyalkylthioalkyl,    alkoxycarbonylalkylthioalkyl, (carboxy)(hydroxy)alkyl,    carboxyalkoxyalkyl, aralkoxycarbonylalkyl,    carboxyalkoxycarbonylalkyl, alkoxycarbonylalkoxycarbonylalkyl,    aminocarbonylalkyl, aralkoxycarbonylaminoalkyl,    alkoxycarbonylalkylaminocarbonylalkyl,    carboxyalkylaminocarbonylalkyl,    (alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl,    (carboxyalkyl)(alkyl)aminocarbonylalkyl; and-   R³ is hydrogen, hydroxy or alkoxy.

Preferred compounds of this subgroup of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-((2-chlorobenzyloxy)carbonyl)amino-pentyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxycarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxy)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-aminopentyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxycarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((carboxy)methyl)aminocarbonyl)ethyl]-aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-ethoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-(1,1-dimethylethoxy)carbonylphenyl)-ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-((methoxycarbonyl)methyl)thioethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(carboxymethyl)thioethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((carboxymethyl)aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(((1,1-dimethylethoxycarbonyl)methyl)aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((1,1-dimethylethoxycarbonyl)methyl)(methyl)aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((carboxy)methyl)(methyl)aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(carboxy)methoxyethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-5-nitroquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((ethoxycarbonyl)methoxycarbonyl)propyl]aminocarbonyl-5-aminoquinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methylsulfonyl)propyl]aminocarbonyl-4-methoxyquinoline.

Another preferred subgroup of this group of compounds is that subgroupof compounds wherein:

-   R² is hydrogen, alkyl, aryl, aralkyl or hydroxyalkyl; and-   R³ is hydrogen, hydroxy, or alkoxy.

Preferred compounds of this subgroup of compounds are those compoundsselected from the group consisting of the following:

-   2-[(4-(1,1-dimethylethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(3-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2-methylpropoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(methoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonylethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-phenylethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-methylpropyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(methoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-hydroxyethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-ethoxyquinoline;-   2-[(3-(benzyloxy)carbonyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(3-carboxy-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl](carboxymethyl)aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2,4-di(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2-carboxy-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-n-propoxyquinoline;-   2-[(3-(methoxycarbonyl)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(3-(carboxy)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-hydroxyphenyl)methyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-carboxyphenyl)methyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2-(methoxycarbonyl)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2-(carboxy)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-(carboxymethoxy)phenyl)methyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-(ethoxycarbonyl)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-(carboxy)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-hydroxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-hydroxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(ethoxycarbonyl)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(carboxy)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-4-hydroxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonylquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-hydroxyquinoline;    and-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.

Another preferred group of compounds of formula (I) as set forth abovein the Summary of the Invention is that group of compounds wherein:

-   a is 1 or 2;-   b is 1;-   A is ═N—;-   R¹ is hydrogen or alkoxycarbonyl;-   R² is carboxyalkyl or alkoxycarbonylalkyl;-   R³ is hydrogen, hydroxy, halo, carboxyalkenyl, alkoxy,    alkoxycarbonyl, di(alkoxycarbonyl)alkoxy, di(carboxy)alkoxy,    (carboxy)(hydroxy)alkoxy, (dialkylamino)(carboxy)alkoxy,    hydroxyalkoxy, cyanoalkoxy, haloalkoxy, haloalkenyloxy,    (cycloalkyl)(alkoxycarbonyl)alkoxy, (cycloalkyl)(carboxy)alkoxy,    alkylthio, carboxy, (dialkylaminocarbonylalkyl)(alkyl)amino,    (carboxyalkyl)(alkyl)amino, (hydroxyalkyl)(alkyl)amino,    (dialkylaminoalkyl)(alkyl)amino, carboxyalkylamino,    mono(alkoxycarbonylalkyl)aminocarbonyl,    mono(carboxyalkyl)aminocarbonyl,    mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,    mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,    mono(dicarboxyalkyl)aminocarbonyl, dialkylaminocarbonylalkoxy,    monoaralkylaminocarbonylalkoxy,    mono(carboxyalkyl)aminocarbonylalkoxy, or    mono(alkoxycarbonylalkyl)aminocarbonylalkoxy;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy,    hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl,    alkylcarbonyl, nitro, amino, monoalkylamino, dialkylamino,    carboxyalkylamino, alkylcarbonylamino, di(alkylcarbonyl)amino,    hydroxyalkyl, dialkylaminoalkyl, carboxyalkoxy,    alkoxycarbonylalkoxy, dialkylaminoalkoxy, and heterocyclylalkoxy;-   each R⁵ is independently selected from the group consisting of    hydrogen, alkyl, hydroxyalkyl, aralkyl, carboxy, alkoxycarbonyl,    aralkoxycarbonyl, carboxyalkyl, and alkoxycarbonylalkyl;-   R⁶ is —N(R⁷)—C(O)—; and-   R⁷ is hydrogen, alkyl, carboxyalkyl, or alkoxycarbonylalkyl.

A preferred subgroup of this group of compounds is that subgroup ofcompounds wherein R³ is hydrogen, hydroxy, halo, alkoxy, hydroxyalkoxy,haloalkoxy, haloalkenyloxy or alkylthio.

Preferred compounds of this subgroup of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-(carboxymethyl)aminoquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-di(acetyl)aminoquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-acetamidoquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-hydroxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-8-methoxy-4-hydroxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-methoxycarbonylpropyl]aminocarbonyl-5-nitroquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(2,2,2-trifluoroethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3,3,3-trifluoropropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3,3,3-trifluoropropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3,4,4-trifluorobut-3-en-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3,4,4-trifluorobut-3-en-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(2-hydroxyethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methylthio)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-(methylthio)quinoline.

Another preferred subgroup of this group of compounds is that subgroupof compounds wherein R³ is carboxyalkenyl, alkoxycarbonyl,di(alkoxycarbonyl)alkoxy, di(carboxy)alkoxy, (carboxy)(hydroxy)alkoxy,(dialkylamino)(carboxy)alkoxy, cyanoalkoxy,(cycloalkyl)(alkoxycarbonyl)alkoxy, (cycloalkyl)(carboxy)alkoxy,carboxy, dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono (carboxyalkyl)aminocarbonylalkoxy, or mono(alkoxycarbonylalkyl)aminocarbonylalkoxy.

Preferred compounds of this subgroup of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-hydroxy-1-carboxypropoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(cyanomethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(dimethylaminocarbonyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(dimethylaminocarbonyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(ethoxycarbonylmethylaminocarbonyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-cyanoethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(benzylaminocarbonyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(benzylaminocarbonyl)methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-((carboxy)methylamino)carbonylmethoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxy-3-(diethylamino)propoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(methoxycarbonyl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methoxycarbonyl)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-carboxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1,1-di(ethoxycarbonyl)methoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1,1-di(carboxy)methoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(2-carboxyethenyl)quinoline    (34 mg);-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-cyclohexyl-1-carboxymethoxy)quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-cyclohexyl-1-(methoxycarbonyl)methoxy)quinoline.

Another preferred subgroup of this group of compounds is that subgroupof compounds wherein R³ is mono (alkoxycarbonylalkyl)aminocarbonyl,mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl, ormono(dicarboxyalkyl)aminocarbonyl.

Preferred compounds of this subgroup of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(methoxycarbonylmethyl)aminocarbonylquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(carboxymethyl)aminocarbonylquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)aminocarbonylquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-(methoxycarbonyl)-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-carboxy-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-[(1-(methoxycarbonyl)-3-carboxypropyl)aminocarbonyl]quinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-[(1,3-dicarboxypropyl)aminocarbonyl]quinoline.

Another preferred subgroup of this group of compounds is that subgroupof compounds wherein R³ is (dialkylaminocarbonylalkyl)(alkyl)amino,(carboxyalkyl)(alkyl)amino, (hydroxyalkyl)(alkyl)amino,(dialkylaminoalkyl)(alkyl)amino, or carboxyalkylamino.

Preferred compounds of this subgroup of compounds are those compoundsselected from the group consisting of the following:

-   2[-1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-((dimethylamino)carbonylmethyl)(methyl)aminoquinoline;-   2[-1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)(methyl)aminoquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methyl)(2-hydroxyethyl)aminoquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methyl)(2-(dimethylamino)ethyl)aminoquinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)aminoquinoline.

Another preferred group of compounds of formula (I) as set forth abovein the Summary of the Invention is that group of compounds wherein:

-   a is 1 or 2;-   b is 1;-   A is ═CH—;-   R¹ is alkoxycarbonyl;-   R² is hydrogen, carboxyalkyl, or aralkoxycarbonylalkyl;-   R³ is hydrogen;-   each R⁴ is independently selected from the group consisting of    hydrogen, alkyl, alkoxy, halo, haloalkyl, haloalkoxy, and hydroxy;-   R⁵ is hydrogen;-   R⁶ is —N(R⁷)—C(O)—; and-   R⁷ is hydrogen or alkyl.

Preferred compounds of this group of compounds are those compoundsselected from the group consisting of the following:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonylnaphthalene;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonylnaphthalene;    and-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonylnaphthalene.

Another preferred group of compounds of formula (I) as set forth abovein the Summary of the Invention is that group of compounds wherein:

-   a is 1;-   b is 1;-   A is ═CH— or ═N—;-   R¹ is alkoxycarbonyl;-   R² is hydrogen, aralkyl, carboxyalkyl, (carboxy)(hydroxy)alkyl,    alkoxycarbonylalkyl, or tetrahydrofuranonyl;-   R³ is hydrogen, alkoxy, or carboxyalkoxy;-   R⁴ is hydrogen, hydroxy, carboxyalkoxy, or alkoxycarbonylalkoxy;-   R⁵ is hydrogen;-   R⁶ is —C(O)—N(R⁷)—; and-   R⁷ is hydrogen, alkyl or carboxyalkyl.

Preferred compounds of this group of compounds are those compoundsselected from the group consisting of the following:

-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]aminonaphthalene;-   2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(ethoxycarbonyl)ethyl)carbonyl]aminonaphthalene;-   2-[(-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl)carbonyl]aminonaphthalene;-   2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(methoxycarbonyl)phenyl)ethyl)carbonyl]-aminonaphthalene;-   2-[(-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-carboxyphenyl)ethyl)carbonyl]aminonaphthalene;-   2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-(methoxycarbonyl)phenyl)ethyl)carbonyl]aminonaphthalene;-   2-[(-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(tetrahydro-2-oxofuran-3-yl)methyl)carbonyl]aminonaphthalene;-   2-[(-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxy-4-hydroxybutyl)carbonyl]aminonaphthalene;-   2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-carboxyphenyl)ethyl)carbonyl]aminonaphthalene;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-5-hydroxynaphthalene;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-4-methoxynaphthalene;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-5-(carboxymethoxy)    naphthalene;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-5-(3-(ethoxycarbonyl)propoxy)    naphthalene;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-5-(3-carboxypropoxy)naphthalene;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-4-(carboxymethoxy)    naphthalene;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl][carboxymethyl]-aminonaphthalene;    and-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl][carboxymethyl]amino-4-methoxynaphthalene.

Of the pharmaceutical compositions of the invention as set forth abovein the Summary of the Invention, preferred pharmaceutical compositionscomprise a pharmaceutically acceptable excipient and a preferredcompound of formula (I) as set forth above.

Of the methods of using the compounds of formula (I) as set forth abovein the Summary of the Invention, preferred methods are those methods ofusing the preferred compounds of formula (I) as set forth above.

Preparation of the Compounds of the Invention

The compounds of the invention are prepared according to the methodsdescribed below in the following Reaction Schemes. It is understood thatthose compounds of the invention which are not specifically prepared inthe following Reaction Schemes may be prepared by similar syntheticprocesses with the appropriately substituted starting materials andreagents by methods known to one of ordinary skill in the art. It isalso understood that during the preparation of the compounds of theinvention, as described below, additional reactive groups (for example,hydroxy, amino or carboxy groups) on the intermediate compounds utilizedin the preparation may be protected as needed by the appropriateprotecting group by treating the intermediate compound prior to thedesired reaction with the appropriate protecting group precursor bymethods known to those of ordinary skill in the art. The protectinggroups may then be removed as desired by methods known to those ofordinary skill in the art, for example, by acidic or basic hydrolysis.Such protecting groups and methods are described in detail in Greene, T.W. and Wuts, P. G. M., Protective Groups in Organic Synthesis, 2ndEdition, 1991, John Wiley & Sons. Preferred nitrogen-protecting groupsare “Boc” (t-butoxycarbonyl) and “CBZ” (benzyloxycarbonyl).

It will also be appreciated by those skilled in the art, although suchprotected derivatives of compounds of formula (I) as described above inthe Summary of the Invention may not possess pharmacological activity assuch, they may be administered to a mammal having a disease-statecharacterized by thrombotic activity and thereafter metabolized in thebody to form compounds of the invention which are pharmacologicallyactive. Such derivatives may therefore be described as “prodrugs”. Allprodrugs of compounds of formula (I) are included within the scope ofthe invention.

It is understood that in the following description, combinations ofsubstituents and/or variables of the depicted formulae are permissibleonly if such combinations result in stable compounds which can beisolated by methods known to those of ordinary skill in the art.Transient compounds are indicated by brackets.

A. Preparation of Compounds of Formula (D)

Compounds of formula (D) are intermediates used in the preparation ofthe compounds of the invention. They may be prepared as described belowin Reaction Scheme 1 wherein b, R¹, R⁵, and R⁷ are as described above inthe Summary of the Invention; PG is a nitrogen-protecting group; R^(1a)is hydrogen or a nitrogen protecting group and R^(2a) is hydrogen,alkyl, aryl, aralkyl, hydroxyalkyl, aminoalkyl,haloalkylsulfonylaminoalkyl, carboxyalkylthioalkyl,alkoxycarbonylalkylthioalkyl, alkoxycarbonylalkyl,aralkoxycarbonylalkyl, aminocarbonylalkyl, aralkoxycarbonylaminoalkyl,heterocyclkylalkyl or cyanoalkyl:

Compounds of formulae (A) and (B) are commercially available, forexample, from Aldrich, or may be prepared according to methods known tothose of ordinary skill in the art, or by methods as described herein.

In general, compounds of formula (D) are prepared by first treating acompound of formula (B) in an aprotic solvent mixture, such astetrahydrofuran (THF) and methylene chloride, with a slightly excessequimolar amount of a peptide coupling reaction additive, such as1-hydroxybenzotriazole (HOBT) and a slightly excess equimolar amount ofcoupling agent for amide formation, such as1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) at ambienttemperature. To this mixture is added a slightly excess equimolar amountof a compound of formula (A) where R^(1a) is hydrogen and the resultingreaction mixture is allowed to stir overnight at ambient temperature.The compound of formula (C) is isolated from the reaction mixture bystandard isolation techniques, such as evaporation and extraction.

Depending on what PG is, the compound of formla (C) is then reducedunder standard hydrogenation conditions, such as treatment with pladiumover carbon under hydrogen or treated under standard hydrolysisconditions to form a compound of formula (D), which is isolated form thereaction mixture by filtration.

Alternatively, compounds of formula (A) where R1 is hydrogen and R1a isa nitrogen protecting group can be treated with the appropriatelysubsituted acid halide, sulfonyl halide, carbamoyl halide or isocyanateto yield the corresponding appropriately substituted compounds offormula (A), which can then be deprotected under standard deprotectingconditions prior to being reacted with the compound of formula (B) toform compounds of formula (C) and (D) wherein R1 is as described abovein the Summary of the Invention.

B. Preparation of Compounds of Formula (Ia) and (Ib)

Compounds of formula (Ia) and (Ib) are compounds of formula (I) and areprepared as described below in Reaction Scheme 2 wherein A is ═N— and R⁶is —N(R⁷)—C(O)—; a and b are as described as above in the Summary of theInvention; R¹ is a nitrogen protecting group or is described as above inthe Summary of the Invention; R^(2a) is hydrogen, alkyl, aryl, aralkyl,hydroxyalkyl, aminoalkyl, haloalkylsulfonylaminoalkyl,alkoxycarbonylalkyl, aralkoxycarbonylalkyl, aminocarbonylalkyl,aralkoxycarbonylaminoalkyl, heterocyclylalkyl or cyanoalkyl; R^(3a) isalkyl, alkoxycarbonylalkyl, di(alkoxycarbonyl)alkyl, carboxyalkyl,di(carboxy)alkyl, (carboxy)(hydroxy)alkyl, (dialkylamino)(carboxy)alkyl,hydroxyalkyl, cyanoalkyl, haloalkyl, haloalkenyl, carboxyalkenyl,alkoxycarbonylalkenyl, (cycloalkyl)(alkoxycarbonyl)alkyl,(cycloalkyl)(carboxy)alkyl, aminocarbonylalkyl,dialkylaminocarbonylalkyl, monoaralkylaminocarbonylalkyl,mono(carboxyalkyl)aminocarbonylalkyl,mono(alkoxycarbonylalkyl)aminocarbonylalkyl, carboxycycloalkyl,alkoxycarbonylcycloalkyl, aminocarbonylcycloalkyl, tetrahydrofuranonyl,or heterocyclylalkyl; R^(3b) is alkoxy, alkoxycarbonylalkoxy,di(alkoxycarbonyl)alkoxy, carboxyalkoxy, di(carboxy)alkoxy,(carboxy)(hydroxy)alkoxy, (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy,cyanoalkoxy, haloalkoxy, haloalkenyloxy, carboxyalkenyloxy,alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,(cycloalkyl)(carboxy)alkoxy, aminocarbonylalkoxy,dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono(carboxyalkyl)aminocarbonylalkoxy,mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy,tetrahydrofuranonyloxy, or heterocyclylalkoxy; R⁴, R⁵ and R⁷ are asdescribed above in the Summary of the Invention; R⁸ is alkyl or aralkyl,and X is halo:

Compounds of formulae (E), (F), and (J) are commercially available, forexample, from Aldrich, or may be prepared according to methods known tothose of ordinary skill in the art. Compounds of formula (G) and formula(H) may alternatively be prepared by methods disclosed in Great BritainPatent No. 1,334,705.

In general, compounds of formulae (Ia) and (Ib) are prepared by firsttreating a compound of formula (F) in a protic solvent, such asmethanol, with an equimolar amount of a compound of formula (E) withstirring at ambient temperature for about 30 minutes to about an hour,preferably for about 30 minutes. The solvent is removed by evaporationto form a residue.

To an aprotic polar solvent, such as diphenyl ether, heated to betweenabout 200° C. and about 250° C., preferably to about 250° C. is thenadded the residue and the temperature of the reaction mixture ismaintained at the high temperature for about 30 minutes to an hour,preferably for about 30 minutes, at which point the reaction mixture isallowed to cool to ambient temperature. The resulting precipitate iscollected and washed with a aprotic polar solvent, such as ether, whichis previously heated to below boiling temperature, to give compounds offormula (G). Further purification, for example, by dissolving themixture in a protic solvent at boiling temperature, such as methanol,and then allowing the mixture to cool to ambient temperature for aperiod of about 1 to about 2 days, preferably for about 2 days, yields acompound of formula (H), which is isolated from the reaction mixture bystandard techniques.

Compound of formula (H) in an aprotic solvent mixture, for example,methylene choride and N,N-dimethylformamide (DMF), is then treated witha slightly excess equimolar amount of a peptide coupling reactionadditive, such as 1-hydroxybenzotriazole (HOBT) and a slightly excessequimolar amount of coupling agent for amide formation, such as1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) at ambienttemperature. An equimolar amount of a compound of formula (D) in anaprotic solvent, such as methylene chloride, is then added to thereaction mixture. The reaction mixture is stirred at ambient temperaturefor about 4 to 6 hours, preferably for about 6 hours. The compound offormula (Ia) is then isolated from the reaction mixture by standardisolation techniques, such as evaporation of the solvents, extraction,and concentration.

The compound of formula (Ia) is then treated under standard Williamsonsynthesis conditions, such as in the presence of a base in an aproticsolvent, for example, cesium carbonate in DMF, with an equimolar amountof a compound of formula (J) at temperatures between about ambienttemperature and 100° C. The reaction mixture is stirred from about 2hours to about 10 hours, preferably for about 10 hours. The compound offormula (Ib) is then isolated from the reaction mixture by standardisolation techniques, such as preparative HPLC.

In addition, compounds of formula (Ib) where R^(2a) isalkoxycarbonylalkyl or aralkoxycarbonylalkyl may be treated underappropriate standard hydrolysis conditions known to those of ordinaryskill in the art to form compounds of formula (Ib) where R^(2a) iscarboxyalkyl.

In addition, compounds of formula (Ib) where R^(3b) isalkoxycarbonylalkoxy, di(alkoxycarbonyl)alkoxy,alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, oralkoxycarbonylcycloalkoxy may be treated under appropriate standardhydrolysis conditions known to those of ordinary skill in the art toform compounds of formula (Ib) where R^(3a) is carboxyalkyl,di(carboxy)alkoxy, carboxyalkenyloxy, (cycloalkyl)(carboxy)alkoxy,mono(carboxyalkyl)aminocarbonylalkoxy or carboxycycloalkoxy.

In addition, compounds of formula (Ib) where R⁴ is nitro can be reducedunder standard reducing conditions to form compounds of formula (Ib)where R⁴ is amino. Such compounds can be further treated with analkylating agent or an acylating agent to form compounds of formula (Ib)where R⁴ is monoalkylamino, dialkylamino, carboxyalkylamino,alkylcarbonylamino, or di(alkylcarbonyl)amino.

In addition, compounds of formula (Ib) where R⁴ is a halo may be treatedwith a compound of formula HR^(3c) wherein R^(3c) is amino,monoalkylamino, dialkylamino, carboxyalkylamino or optionallysubstituted N-heterocyclyl (where the hydrogen in HR^(3c) is attached tothe nitrogen in the N-heterocyclyl) in a similar manner as describedbelow for compounds of formula (Iw) to form compounds of formula (Ib)wherein R⁴ is amino, monoalkylamino, dialkylamino, carboxyalkylamino oroptionally substituted N-heterocyclyl (where the N-heterocyclyl isattached to the quinoline ring via the nitrogen atom in theN-heterocyclyl). These compounds may be further treated with anappropriate acylating agent under standard acylation conditions to formcompounds of formula (Ib) wherein R⁴ is alkylcarbonylamino ordi(alkylcarbonyl)amino.

In addition, compounds of formula (Ib) where R^(2a) is cyanoalkyl and/orR^(3b) is cyanoalkoxy can be treated under standard conditions, such assodium azide, tributyl tin chloride in refluxing toluene, to formcompounds of formula (Ib) where R^(2a) is tetrazolylalkyl and/or R^(3b)is tetrazolylalkoxy.

In addition, compounds of formula (Ib) where R^(2a) is aminoalkyl can betreated under standard acylation conditions, such as treatment with ahaloalkylsulfonyl halide in the presence of a base, such astriethylamine, in an aprotic solvent, to form compounds of formula (Ib)where R^(2a) is haloalkylsulfonylaminoalkyl.

In addition, compounds of formula (Ib) where R⁴ is alkyl can be treatedunder standard bromination conditions, such as treatment withN-bromosuccinimde carbon tetrachloride and azobisisobutyronitrile (AIBN)to form compounds of formula (Ib) where R⁴ is bromoalkyl. Thesecompounds may be further treated with a nucleophile, such as adialkylamine group, to form compounds of formula (Ib) where R⁴ isdialkylaminoalkyl.

In addition, compounds of formula (Ib) where R⁴ is hydroxy may betreated with the appropriate group under standard ether synthesisconditions, such as Williamson ether synthesis conditions, to formcompounds of formula (Ib) where R⁴ is alkoxy, aralkoxy, haloalkoxy,carboxyalkoxy, alkoxycarbonylalkoxy, dialkylaminoalkoxy orheterocyclylalkoxy.

In addition, compounds of formula (Ib) where R^(2a) and/or R^(3b)contain a carboxy group may be esterified under standard esterificationconditions, such as Fischer esterification conditions, to form compoundsof formula (Ib) where R^(2a) and/or R^(3b) contain a correspondingalkoxycarbonyl group.

Alternatively, compounds of formula (D) as prepared above in ReactionScheme 1 can be reacted with compounds of the following structure:

which are commercially avaible or prepared by methods known to one ofordinary skill in the art, under standard acylation conditions to formadditional compounds of the invention.

A preferred method of making intermediates used in the preparation ofthe compounds of the invention which avoids the formation of undesiredregiosiomers with respect to the substitution on the quinoline ring isillustrated below in Reaction Scheme 2a wherein R^(4b) is alkyl, alkoxy,aralkoxy, carboxy, alkoxycarbonyl, aminocarbonyl, alkylcarbonylamino,di(alkylcarbonyl)amino, carboxyalkoxy, alkoxycarbonylalkoxy orheterocyclylalkoxy; X is ioido, chloro or bromo; and R⁸ is alkyl oraralkyl:

Compounds of formula (Fa) and formula (E) are commercially available, orcan prepared according to methods known to those of ordinary skill inthe art.

In general, compounds of formula (Gb) are prepared by first treating acompound of formula (Fa) with a reducing agent, such as tin (II)chloride dihydrate, under standard chemical reduction conditions, suchas in a protic solvent, to form the compound of formula (Fb), which isisolated from the reaction mixture by standard isolation techniques.

The compound of formula (Fb) in a protic solvent, such as methanol, isthen treated with a slightly excess equimolar amount of a compound offormula (E) at reflux temperatures for about 2 to about 4 hours,preferably for about 4 hours. The reaction mixture is then concentrated.An organic solvent is heated to a non-boiling point temperature ofbetween about 240° C. and about 260° C., and the concentrate is thenadded to the solvent. The temperature of the mixture is maintained atthe non-boiling point temperature for about 10 to 20 minutes, preferablyfor about 20 minutes. The reaction mixture is then cooled slowly toambient temperature and diluted with an organic solvent. The compound offormula (Ga) is isolated from the reaction mixture by standard isolationtechniques, such as filtration.

The compound of formula (Ga) is treated with a hydrolyzing agent understandard hydrolysis conditions and then treated under standard reducingconditions, such as hydrogen gas and palladium over carbon, to form acompound of formula (Gb).

Compounds of formula (Gb) may then be used in place of compounds offormula (G) in Reaction Scheme 1 to prepare compounds of formula (Ia)and formula (Ib).

C. Preparation of Compounds of Formulae (Ic) and (Id)

Compounds of formula (Ic) and (Id) are compounds of formula (I) whereinR⁶ are —C(O)—N(R⁷)— where R⁷ is hydrogen and are prepared as describedbelow in Reaction Scheme 3 wherein A, a, b, R¹, R³, R⁴ and R⁵ are asdescribed above in the Summary of the Invention; R^(1a) is hydrogen;R^(2a) is alkyl, aralkyl, alkylsulfonylalkyl, aralkoxyalkyl,hydroxyalkyl, aminoalkyl, haloalkylsulfonylaminoalkyl,alkoxycarbonylalkylthioalkyl, alkoxycarbonylalkyl,aralkoxycarbonylalkyl, alkoxycarbonylalkoxycarbonylalkyl,aminocarbonylalkyl, aralkoxycarbonylaminoalkyl,alkoxycarbonylalkylaminocarbonylalkyl,(alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl, tetrahydrofuranonyl, orheterocyclylalkyl; R⁸ is alkyl or aralkyl; and each X is indepedentlyhalo:

Compounds of formulae (A), (K), (L) and (O) are commercially available,for example, from Aldrich, or may be prepared according to methods knownto those of ordinary skill in the art.

In general, compounds of formulae (Ic) and (Id) are prepared by firsttreating a compound of formula (L) in an aprotic solvent, such asmethylene chloride, with a slightly excess equimolar amount of acompound of formula (K) in an aprotic solvent, such as methylenechoride, in the presence of a base, such as triethylamine, at atemperature of between about 5° C. to about 10° C., preferably at about5° C. The reaction mixture is stirred from about 30 minutes to about anhour, preferably for about an hour, at a temperature of between about 5°C. to about 15° C., preferably at about 10° C. The compound of formula(M) is then isolated from the reaction mixture by standard isolationtechniques, such as organic solvent extraction, and evaporation.

The compound of formula (M) is then hydrolyzed under standard hydrolysisconditions, such as treatment with lithium hydroxide in a proticsolvent, such as methanol, to form a compound of formula (N), which isisolated from the reaction mixture by standard isolation techniques,such as acidifying the reaction mixture, organic solvent extraction andevaporation. Compounds of formula (N) wherein the R³ substituentcontains a carboxy group are protected accordingly prior to the nextstep.

The compound of formula (N) in an aprotic solvent, such as methylenechloride, in the presence of a base, such as triethylamine, and aslightly excess equimolar amount of a peptide coupling agent, such asHOBT and/or EDCI, at ambient temperature, is treated with a compound offormula (A). The resulting reaction mixture is stirred from about 6hours to about 12 hours, preferably for about 12 hours, at ambienttemperature. The compound of formula (Ic) is isolated from the reactionmixture by standard isolation techniques.

A compound of formula (Ic) in an aprotic solvent, such as DMF, wasslowly added to a suspension of a strong base in an aprotic solvent,such as sodium hydride in DMF. The resulting reaction mixture wasstirred at ambient temperature for a few minutes, preferably for about 5minutes. An equimolar amount of a compound of formula (O) in an aproticsolvent, such as DMF, was then added to the reaction mixture. Afterquenching the reaction with the addition of water after about 10 toabout 20 minutes, preferably after about 10 minutes, the compound offormula (Id) was isolated from the reaction mixture by standardisolation techniques, such as organic solvent extraction, evaporationand purification by flash chromatography.

Compounds of formula (Id) wherein R^(2a) is aryl (substituted byalkoxycarbonyl), aralkyl (substituted by alkoxycarbonyl),alkoxycarbonylalkylthioalkyl, alkoxycarbonylalkyl,aralkoxycarbonylalkyl, alkoxycarbonylalkoxycarbonylalkyl,aralkoxycarbonylaminoalkyl, alkoxycarbonylalkylaminocarbonylalkyl,(alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl, heterocyclylalkyl(wherein the heterocyclyl radical is substituted by alkoxycarbonyl); maybe further treated under standard hydrolysis or de-protecting conditionsto form compounds of formula (Id) wherein R^(2a) is aryl (substituted bycarboxy), aralkyl (substituted by carboxy), carboxyalkylthioalkyl,carboxyalkyl, carboxyalkoxycarbonylalkyl, aminoalkyl,aminocarbonylalkyl, (carboxyalkyl)(alkyl)aminocarbonylalkyl,heterocyclylalkyl (wherein the heterocyclyl radical is substituted bycarboxy).

In a similar manner, compounds of formula (Ic) or (Id) wherein the R³substituent contains a protected carboxy group may be treated to formthe corresponding compounds of formula (Ic) and (Id) wherein the R³substituent contains a free carboxy group.

Compounds of formula (Ic) and (Id) may further be treated with anappropriate alkylating agent under standard conditions to form compoundsof formula (Ic) and (Id) wherein R⁷ is alkyl, carboxyalkyl oralkoxycarboxyalkyl (R⁷).

D. Preparation of Compounds of Formulae (If) and (Ig)

Compounds of formulae (If) and (Ig) are compounds of formula (I) and areprepared as described below in Reaction Scheme 4 from compounds offormula (Ie), which are compounds of formula (I) synthesized asdescribed above in Reaction Scheme 2 and Reaction Scheme 3 where R^(2a)is hydroxybenzyl. In the following Reaction Scheme 4, R⁶ and A are asdescribed above in the Summary of the Invention; R¹, R³, R⁴, R⁵, a, andb are as described above in Reaction Scheme 2 and Reaction Scheme 3; andR⁸ is alkyl or aralkyl:

Compounds of formula (Ie) are prepared as disclosed herein. (CF₃SO₂)₂Ois commercially available or may be prepared according to methods knownto those skilled in the art.

In general, compounds of formulae (If) and (Ig) are prepared by firsttreating a compound of formula (Ie) in an aprotic solvent, such asmethylene chloride, at a temperature of between −40° C. and −30° C.,preferably at −30° C., in the presence of a base, such as triethylamineand/or dimethylaminopyridine, with a excess equimolar amount of(CF₃SO₂)₂O. The resulting reaction mixture is allowed to warm to ambienttemperature. The compound of formula (Q) is then isolated from thereaction mixture by standard isolation techniques, such as evaporationand purification by flash chromatography.

The compound of formula (Q) in an aprotic solvent and base is treatedwith carbon monoxide in the presence of a compound of formula R⁸OH and apalladium (II) catalyst at ambient temperature. The reaction mixture isheated to between about 50° C. and about 100° C. for about 30 minutes toabout one hour. The reaction mixture is cooled to ambient temperatureand a compound of formula (If) is isolated from the reaction mixture bystandard isolation techniques, such as filtration, concentration andflash column chromatography.

The compound of formula (If) is hydrolyzed under standard hydrolysisconditions to form the compound of formula (Ig).

E. Preparation of Compounds of Formula (Ih)

Compounds of formula (Ih) are compounds of formula (I) and are preparedas described below from compounds of formula (Ie), which are compoundsof formula (I) prepared as described herein. In particular, in thefollowing Reaction Scheme 5, R¹, R³, R⁴, R⁵, R⁶, A, a and b are asdescribed above in the Summary of the Invention; each R_(a) isindependently an alkyl radical; and X is halo:

Compounds of formula (Ie) are prepared by methods disclosed herein.Compounds of the formula X—R_(a)—C(O)R_(a) where each R_(a) isindependently an alkyl radical are commercially available or may beprepared according to methods known to those of ordinary skill in theart.

In general, compounds of formula (Ih) are prepared by treating acompound of formula (Ie) in an aprotic solvent, such as DMF, in thepresence of a base, preferably cesium carbonate, with a compound havingthe formula X—R_(a)—C(O)OR_(a) where X is halo, preferably bromo orchloro, and each R_(a) is independently an alkyl radical. The resultingreaction mixture is stirred at ambient temperature for about 4 hours toabout 8 hours, preferably for about 6 hours. The compound of formujla(Ih) is isolated from the reaction mixture by standard isolationtechniques, such as organic solvent extraction, evaporation andpurification by HPLC.

Compounds of formula (Ih) may be further hydrolyzed under standardhydrolysis condtions to form compounds having the corresponding acidsubsitutents.

F. Preparation of Compounds of Formula (Ij)

Compounds of formula (Ij) are compounds of invention and are prepared asdescribed below in Reaction Scheme 6 from compounds of formula (Ii),which are compounds of formula (I) prepared as described herein. In thefollowing Reaction Scheme 6, R¹, R³, R⁴, R⁵, R⁶, A, a and b are asdescribed above in the Summary of the Invention; each R_(a) isindependently an alkyl radical; and X is halo:

Compounds of formula (Ii) are prepared by methods disclosed herein.Compounds of formula X—R_(a)—C(O)OR_(a) are commercially available ormay be prepared according to methods known to those skilled in the art.

In general, compounds of formula (Ij) are prepared by treating acompound of formula (ii) in an aprotic solvent, such as tetrahydrofuran,at a temperature of between about −5° C. and about 5° C., preferably at0° C., in the presence of a base, such as potassiumhexamethyldisilazide, with a compound having the formulaX—R_(a)—C(O)OR_(a) where X is halo, preferably bromo, and each Ra isindependently an alkyl radical. The resulting reaction mixture isstirred from about 30 minutes to 2 hours, preferably for an hour, at atemperature of between about −5° C. and about 5° C., preferably at 0° C.The reaction is quenched with the addition of water. The compound offormula (Ij) is isolated from the reaction mixture by standard isolationtechniques, such as organic solvent extraction, concentration andpurification by elution through silica gel.

Compounds of formula (Ij) may be further hydrolyzed under standardhydrolysis condtions to form compounds having the corresponding acidsubsitutents.

G. Preparation of Compounds of Formulae (II), (Im) and (In)

Compounds of formulae (II), (Im) and (In) are compounds of formula (I)and are prepared as described below in Reaction Scheme 7 from compoundsof formula (Ik), which are compounds of formula (I) prepared asdescribed herein. In the following Reaction Scheme 7, A, a, b, R¹, R³,R⁴, R⁵ and R⁶ are as described above in the Summary of the Invention;each R_(a) is independently an alkyl radical; R⁹ is hydrogen or alkyl;and X is halo:

Compounds of formula (Ik) are prepared according to methods disclosedherein. Compounds of the formula HN(R⁹)—R_(a)—C(O)OR_(a) and formulaX—R_(a)—C(O)OR_(a) are commercially available or may be preparedaccording to methods known to those of ordinary skill in the art. Ifdesired, compounds of formula (Ik) wherein R³ is hydroxy or contains ahydroxy group may be protected by an appropriate oxygen-protecting groupto avoid undesired side reactions.

In general, compounds of formula (II) and (Im) are prepared by treatinga compound of formula (Ik) in an aprotic solvent, such as DMF, with anexcess equimolar amount of a compound having the formulaX—R_(a)—C(O)OR_(a) where X is halo, preferably bromo, and each R_(a) is2-[(4-(n-butyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinolinereaction mixture is heated to a temperature of between about 45° C. andabout 55° C., preferably at about 50° C., for about 30 minutes to aboutan hour, preferably for about an hour. The compound of formula (II) isthen isolated from the reaction mixture by standard isolationtechniques, such as organic solvent extraction and evaporation.

The compound of formula (II) in an aprotic solvent, such as methylenechloride, is treated under standard hydrolysis conditions to form acompound of formula (Im).

In general, compounds of formula (In) are prepared by treating acompound of formula (Ik) in an aprotic solvent, such as tetrahydrofuran,with a slightly excess equimolar amount of a compound having the formulaHN(R⁹)—R_(a)—C(O)OR_(a) where R⁹ is hydrogen or alkyl and each R_(a) isindependently an alkyl radical, in the presence of equimolar amounts ofa peptide coupling agent, such as EDCI and/or HOBT and a protonscavenger, such as diisopropylethylamine (DIEA). The reaction mixture isstirred from about 6 hours to about 16 hours, preferably for about 12hours. The compound of formula (In) is isolated from the reactionmixture by standard isolation techniques, such as organic solventextraction, concentration and purification by elution through silicagel.

Compounds of formula (In) may be further hydrolyzed under standardhydrolysis condtions to form compounds having the corresponding acidsubsitutents.

H. Preparation of Compounds of Formula (Ip)

Compounds of formula (Ip) are compounds of formula (I) and are preparedas described below in Reaction Scheme 8 from compounds of formula (Io),which are compounds of formula (I) prepared as described above inReaction Scheme 2. In the following Reaction Scheme 8, A, a, b, R¹, R³,R⁴, R⁵ and R⁶ are as described above in the Summary of the Invention;each R_(a) is independently an alkyl radical and R₉ is hydrogen oralkyl:

Compounds of formula (Io) are prepared as described herein. Compounds offormula HN(R⁹)—R_(a)—C(O)OR_(a) are commercially available or may beprepared according to methods known to those of ordinary skill in theart.

In general, compounds of formula (Ip) are prepared by treating acompound of formula (Io) in an aprotic solvent, such as tetrahydrofuran,with an slight excess equimolar amount of a compound having the formulaHN(R⁹)—R_(a)—C(O)OR_(a) where R⁹ is hydrogen or alkyl and each R_(a) isindependently an alkyl radical, in the presence of an equimolar amountsof a peptide coupling agent, such as HOBT and EDCI and a protonscavenger, such as DIEA. The resulting reaction mixture is stirred atambient temperature for between about 6 hours and about 16 hours,preferably for about 12 hours. The compound of formula (Ip) is isolatedfrom the reaction mixture by standard isolation techniques, such asorganic solvent extraction and concentration.

If desired, compounds of formula (Ip) may be further hydrolyzed understandard condtions to form compounds having the corresponding acidsubsitutents.

I. Preparation of Compounds of Formula (Ir) and (Is)

Compounds of formula (Ir) and (Is) are compounds of formula (I) and areprepared as described below in Reaction Scheme 9 from compounds offormula (Iq), which are compounds of formula (I) prepared as describedabove in Reaction Scheme 2. In the following Reaction Scheme 9, A, a, b,R¹, R³, R⁴, R⁵ and R⁶ are as described above in the Summary of theInvention; each R_(a) is independently an alkyl radical; and X is halo:

Compounds of formula (Iq) are prepared by methods described herein oraccording to methods known to those of ordinary skill in the art.Compounds of formula X—R_(a)—C(O)OR_(a) are commercially available ormay be prepared by methods known to those of ordinary skill in the art.

In general, compounds of formula (Ir) and (Is) are prepared by firsttreating a compound of formula (Iq) in an aprotic solvent, such as DMF,with a slightly excess equimolar amount of a compound of formulaX—R_(a)—C(O)OR_(a) where X is halo, preferably bromo, and each R_(a) isindependently an alkyl radical, in the presence of a base, such aspotassium carbonate, and a metal halide, such as sodium iodide. Thereaction mixture is heated at between about 40° C. and about 60° C.,preferably at about 50° C., for about 30 minutes to about an hour,preferably for about an hour. The compound of formula (Ir) is isolatedfrom the reaction mixture by standard techniques, such as evaporationand flash column chromatography.

The compound of formula (Ir) is the hydrolyzed under standard hydrolysisconditions to form the compound of formula (Is).

J. Preparation of Compounds of Formula (It)

Compounds of formula (It) are compounds of formula (I) wherein A is ═N—and R⁶ is —N(R⁷)—C(O)— and are prepared as described below in ReactionScheme 10 wherein a, b, R¹, R², R³, R⁴, and R⁵ are as described above inthe Summary of the Invention; R^(7a) is carboxyalkyl oralkoxycarbonylalkyl; and each X is independently halo:

Compounds of formula (A), formula (R), and formula (T) are commerciallyavailable or may be prepared according to methods known to those ofordinary skill in the art. Compounds of formula (V) may be preparedaccording to methods disclosed herein.

In general, compounds of formula (It) are prepared by first treating acompound of formula (A) in an aprotic solvent, such as methylenechloride, with an one-half equimolar amount of a compound of formula (R)in the presence of a base, such as triethylamine, at a temperature ofabout −10° C. to about 10° C., preferably at about 0° C. The resultingreaction is stirred at ambient temperature for about 2 hours to about 6hours, preferably for about 2 hours. The compound of formula (S) isisolated from the reaction mixture by standard isolation techniques.

The compound of formula (S) is then treated with an equimolar amount ofa compound of formula (T) in the presence of a base, such as cesiumcarbonate. The resulting reaction mixture is stirred at a temperature ofabout 40° C. to about 60° C., preferably at about 50° C., for about 30minutes to about 2 hours, preferably for about an hour. The compound offormula (U) is isolated from the reaction mixture by standard isolationtechniques, such as organic solvent extraction and evaporation.

To a compound of formula (V) in an aprotic solvent, such as methylenechloride, in the presence of a base, such as triethylamine, and aslightly excess equimolar amount of a peptide coupling agent, such asHOBT and/or EDCI, is then added the compound of formula (U). Thereaction mixture is stirred at ambient temperature for about 6 hours toabout 16 hours, preferably for about 12 hours. The compound of formula(It) is isolated from the reaction mixture by standard isolationtechniques, such as evaporation of the solvents and purification byflash column chromatography.

The compound of formula (It) may then be hydrolyzed under standardhydrolysis conditions to form compounds having the corresponding acidsubsitutents.

K. Preparation of Compounds of Formula (Iu)

Compounds of formula (Iu) are compounds of formula (I) wherein A is ═CH—and R⁶ is —C(O)—N(R⁷)— and are prepared as described in Reaction Scheme11 below wherein a, b, R¹, R³, R⁴ and R⁵ are as described above in theSummary of the Invention; R^(2b) is hydrogen; R^(7b) isalkoxycarbonylalkyl; R⁸ is alkyl or aralkyl; and each X is independentlyhalo:

Compounds of formula (L), formula (W), formula (Y) and formula (A) arecommercially available, or may be prepared according to methods known tothose of ordinary skill in the art.

In general, compounds of formula (Iu) are prepared by first treating acompound of formula (L) in an aprotic solvent, such as DMF, with anexcess equimolar amount of a compound of formula (W) in the presence ofa base, such as potassium carbonate. The resulting reaction mixture wasstirred at ambient temperature for about 6 hours to about 24 hours,preferably for about 24 hours. The compound of formula (X) is isolatedfrom the reaction mixture by standard isolation techniques, such asorganic solvent extraction and evaporation.

The compound of formula (X) in an aprotic solvent, such as methylenechloride, was treated with an excess equimolar amount of a compound offormula (Y) in the presence of a base, such as triethylamine. Theresulting reaction mixture was stirred at ambient temperature for about6 hours to about 2 days, preferably for about 12 hours. The compound offormula (Z) is isolated from the reaction mixture by standard isolationtechniques, such as evaporation of the solvents and purification byflash chromatography. The compound of formula (Z) is then hydrolyzedunder standard hydrolyis conditions to form a compound of formula (AA).

The compound of formula (AA) in an aprotic solvent, such as methylenechloride, in the presence of a base, such as triethylamine, and in thepresence of an equimolar amount of peptide coupling reagent, such asHOBT and/or EDCI, is treated with an equimolar amount of a compound offormula (A). The reaction mixture is stirred from about 6 hours to about16 hours, preferably for about 16 hours. The compound of formula (Iu) isisolated from the reaction mixture by standard isolation techniques,such as concentration, organic solvent extraction, evaporation of thesolvents and purification by flash column chromatography.

The compound of formula (Iu) may then be hydrolyzed under standardhydrolysis conditions to form compounds having the corresponding acidsubsitutents.

L. Preparation of Compounds of Formula (Iv) and Formula (Iw)

Compounds of formula (Iv) and compounds of formula (Iw) are compounds offormula (I) wherein A is ═N— and R⁶ is —N(R⁷)—C(O)— and are prepared asdescribed below in Reaction Scheme 12 wherein a, b, R¹, R², R⁴ and R⁵are as described above in the Summary of the Invention; R^(2a) isalkoxycarbonylalkyl or carboxyalkyl; R^(3b) is halo; R^(3c) isoptionally substituted N-heterocyclyl, (carboxyalkyl)(alkyl)amino, orcarboxyalkenyl; and R^(7a) is hydrogen or alkyl:

Compounds of formula (U) are prepared by methods disclosed herein.Compounds of formula (BB) are commercially available, or may be preparedaccording to methods disclosed in Monatsh. Chem. (1921), Vol. 42, p. 89,or in J. Org. Chem. (1947), Vol. 12, p. 456. Compounds of the formulaHR^(3c) are commercially available or may be prepared according tomethods known to those of ordinary skill in the art.

In general, compounds of formula (Iv) and formula (Iw) are prepared bytreating a compound of formula (BB) in an aprotic solvent, such astetrahydrofuran, with an equimolar amount of a compound of formula (U)in the presence of a base, such as triethylamine and in the presence ofa slightly excess equimolar amount of a peptide coupling agent, such asHOBT and/or EDCI. The resulting reaction mixture is stirred at ambienttemperature for about 6 hours to about 16 hours, preferably for about 16hours. The compound of formula (Iv) is isolated from the reactionmixture by standard isolation techniques, such as organic solventextraction and purification by flash column chromatography. The compoundof formula (Iv) may be further treated under standard hydrolysisconditions to form additional compounds of formula (Iv).

The compound of formula (Iv) in an aprotic solvent, such as dimethylsulfoxide, is then treated with an excess equimolar amount of a compoundof formula HR^(3c) in the presence of a base, such as DIEA. Theresulting reaction mixture is heated to about 100° C. to about 110° C.,preferably to about 110° C. for about 6 hours to about 24 hours,preferably for about 18 hours. The resulting reaction mixture is thentreated with a strong base, such as lithium hydroxide, for about 2 hoursto about 4 hours, preferably for about 4 hours, to form the compound offormula (Iw), which is isolated from the reaction mixture by preparativeHPLC.

Alternatively, the compound of formula (Iv) is treated with a compoundof formula HR^(3c) where R^(3c) is carboxyalkenyl under standardpalladium catalyzed conditions to form compounds of formula (Iw) whereR^(3c) is carboxyalkenyl.

Alternatively, compounds of formula (Iv) and formula (Iw) wherein the R²group contains an ester radical, such as alkoxycarbonyl, may behydrolyzed under standard hydrolysis conditions to form compounds offormula (Iv) and formula (Iw) wherein the R² group contains thecorresponding carboxy radical.

M. Preparation of Compounds of Formula (Ix) and Formula (Iy)

Compounds of formula (Ix) and Formula (Iy) are compounds of formula (I)wherein A is ═N— and R⁶ is —N(R⁷)—C(O)— and are prepared as describedbelow in Reaction Scheme 13 wherein a, b, R¹, R², R⁴, and R⁵ are asdescribed above in the Summary of the Invention; R^(7a) is hydrogen oralkyl; and R⁸ is alkyl or aralkyl:

Compounds of formula (CC) are commercially available, for example, fromAldrich Co. Compounds of formula (DD) are commercially available or maybe prepared according to methods known to those of ordinary skill in theart. Compounds of formula (U) are prepared by methods disclosed hereinor by methods known to those of ordinary skill in the art.

In general, compounds of formula (Ix) and formula (Iy) are prepared byfirst treating a compound of formula (CC) with a halogenating agent,such as chlorotrimethylsilane (TMSCI) to form the corresponding acidhalide, preferably the corresponding acid chloride, which is thentreated with an excess molar amount of a compound of formula (DD) toform the compound of formula (EE).

The compound of formula (EE) in an aprotic solvent, such astetrahydrofuran, is then treated with a slightly excess equimolar amountof a compound of formula (U) in the presence of a slightly excessequimolar amount of a peptide coupling agent, such as HOBT and/or EDCI.The resulting solution is stirred from about 6 hours to about 18 hours,preferably for about 16 hours. The compound of formula (Ix) is isolatedfrom the reaction mixture by standard isolation techniques, such asconcentration of the product, organic solvent extraction, evaporationand purification by flash column chromatography. Compounds of formula(Ix) may be treated under standard hydrolysis conditions to formcompounds of formula (Iy).

Compounds of formula (Iy) can be further treated with compounds such asa substituted amine, a mono(alkoxycarbonylalkyl)amine, or amono(dialkoxycarbonylalkyl)amine under standard peptide couplingreaction conditions, such as in the presence of standard peptidecoupling agents such as HOBT and EDCI to form compounds of formula (Iy)wherein R⁴ is aminocarbonyl, mono(alkoxycarbonylalkyl)aminocarbonyl, ormono(di(alkoxycarbonyl)alkyl)aminocarbonyl. These compounds compoundscan be further treated under standard hydrolysis conditions to formcompounds of formula (Iy) wherein R⁴ is mono(carboxyalkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl ormono(dicarboxyalkyl)aminocarbonyl.

N. Preparation of Compounds of Formula (Iz)

Compounds of formula (Iz) are compounds of formula (I) wherein A is ═N—and R⁶ is —N(R⁷)—C(O)— and are prepared as described below in ReactionScheme 14 wherein a, b, R¹, R², R⁴, and R⁵ are as described above in theSummary of the Invention; R^(7a) is hydrogen or alkyl; R⁸ is alkyl oraralkyl; and X is halo:

Compounds of formula (FF) and formula (DD) are commercially available ormay be prepared according to methods known to those skilled in the art.Compounds of formula (U) are prepared by methods disclosed herein or bymethods known to those of ordinary skill in the art.

In general, compounds of formula (Iz) are prepared by first treating acompound of formula (FF) in an aprotic solvent, such as DMF, with anexcess equimolar amount of an alkyl halide, preferably methyl iodide, inthe presence of a base, preferably cesium carbonate. The reactionmixture is stirred at a temperature between about 60° C. and about 100°C., preferably at about 70° C., from about 6 hours to about 18 hours,preferably for about 12 hours. The compound of formula (GG) is isolatedfrom the reaction mixture by standard isolation techniques, such asorganic solvent extraction, evaporation and purification by flash columnchromatography.

The compound of formula (GG) is hydrolyzed under standard hydrolysisconditions to form a compound of formula (HH). The compound of formula(HH) in an aprotic solvent, such as THF and/or DMF, is then treated witha slightly excess equimolar amount of a compound of formula (U) in thepresence of a slightly excess equimolar amount of a peptide couplingagent, such as HOBT and/or EDCI. The resulting mixture is stirred atambient temperature from about 6 hours to about 18 hours, preferably forabout 12 hours. The compound of formula (Iz) is isolated from thereaction mixture by standard isolation techniques, such asconcentration, organic solvent extraction, evaporation of solvents andpurification by flash column chromatography. The compound of formula(Iz) may be further treated under standard hydrolysis conditions to formcompounds of the invention having the corresponding acid substituents.

All compounds of the invention as prepared above which exist in freebase or acid form may be converted to their pharmaceutically acceptablesalts by treatment with the appropriate inorganic or organic base oracid. Salts of the compounds prepared above may be converted to theirfree base or acid form by standard techniques.

The following specific preparations and examples are provided as a guideto assist in the practice of the invention, and are not intended as alimitation on the scope of the invention. Where one or more NMR's aregiven for a particular compound, each NMR may represent a singlestereoisomer, a non-racemic mixture of stereoisomers or a racemicmixture of the stereoisomers of the compound.

Preparation 1 Compounds of Formula (D)

A. To a solution of N-carbobenzyloxy-L-glutamic acid gamma t-butyl ester(24.4 g, 72.3 mmol) in tetrahydrofuran (“THF”) (400 mL) and CH₂Cl₂ (100mL) was added 1-hydroxybenzotriazole (“HOBT”) (10.7 g, 79.5 mmol) and1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (“EDCI”) (15.3 g, 79.5mmol). After 5 minutes, 1-ethoxycarbonylpiperazine (11.7 mL, 79.5 mmol)was added and the reaction was stirred overnight. The reaction mixturewas evaporated in vacuo to afford an oil, which was dissolved in ethylacetate, and washed with saturated NaHCO₃, 1M HaHSO₄ and brine. Theorganic layer was evaporated in vacuo to4-ethoxycarbonyl-1-(1-amino-3-(1,1-dimethylethoxycarbonyl)propyl)carbonylpiperazine(40.7 g), as an oil that was used without further purification. To4-ethoxycarbonyl-1-(1-(benzyloxycarbonyl)amino-3-(1,1-dimethylethoxycarbonyl)propyl)carbonylpiperazinein MeOH (100 mL) was added 10% Pd/C (1 g) and the mixture was shakenunder 50 psi H₂ overnight. The reaction was filtered and stripped to4-ethoxycarbonyl-1-(1-amino-3-(1,1-dimethylethoxycarbonyl)propyl)carbonylpiperazine(25 g, 99%) and used without further purification; NMR (CDCl₃) 1.25 (t,3), 1.43 (s, 9), 2.55 (m, 1), 1.90 (m, 1), 2.37 (m, 1), 2.55 (m, 1),3.40-3.70 (m, 8), 3.80 (m, 1), 4.18 (q, 2) ppm.

B. In a similar manner, other compounds of formula (D) were prepared.

-   4-ethoxycarbonyl-1-(aminomethyl)carbonylpiperazine;-   4-ethoxycarbonyl-1-(1-amino-3-carboxypropyl)carbonylpiperazine;-   4-ethoxycarbonyl-2-methyl-1-(aminomethyl)carbonylpiperazine;-   4-ethoxycarbonyl-3-methyl-1-(aminomethyl)carbonylpiperazine;-   4-ethoxycarbonyl-1-(1-amino-5-((2-chlorobenzyloxy)carbonylamino)pentyl)carbonylpiperazine;-   4-ethoxycarbonyl-1-(1-amino-2-(benzyloxycarbonyl)ethyl)carbonylpiperazine;-   4-ethoxycarbonyl-1-(1-amino-2-phenyl ethyl)carbonylpiperazine;-   4-ethoxycarbonyl-1-(1-amino-2-methylpropyl)carbonylpiperazine;-   4-ethoxycarbonyl-1-(1-amino-2-carboxyethyl)carbonylpiperazine; and-   4-ethoxycarbonyl-1-(1,5-diaminopentyl)carbonylpiperazine.

Preparation 2 Compounds of Formula (G)

A. To a solution of m-toludine (20.0 g, 0.186 mol) in methanol (300 mL),dimethyl acetylenedicarboxylate (26.42 g, 0.186 mol) was added drop-wiseand the reaction mixture was stirred at ambient temperature for 30minutes. The solvent was removed by evaporation and the residue wasadded to stirred diphenyl ether (150 ml), which has been preheated to250° C. After 30 minutes, the mixture was cooled to ambient tempertureand the resulting precipitate was collected and washed with hotpetroleum ether (1.5 L) to give a mixture (27.0 g) of5-methyl-4-hydroxy-2-methoxycarbonylquinoline and7-methyl-4-hydroxy-2-methoxycarbonylquinoline. The mixture was dissolvedin boiling methanol (1.3 L) and kept at ambient temperature for two daysto afford (6.45 g, 16%) of7-methyl-4-hydroxy-2-methoxycarbonylquinoline, NMR (DMSO-d₆) 2.40 (s,3), 3.92 (s, 3), 6.56 (s, 1), 7.16 (d, 1), 7.68 (s, 1), 7.94 (d, 1) ppm.

B. In a similar manner, other compounds of formula (G) were prepared asfollows:

-   8-methoxy-4-hydroxy-2-methoxycarbonylquinoline;-   5-amino-4-hydroxy-2-methoxycarbonylquinoline;-   5-nitro-4-hydroxy-2-methoxycarbonylquinoline;-   5-carboxymethylamino-4-hydroxy-2-methoxycarbonylquinoline;-   7-chloro-4-hydroxy-2-methoxycarbonylquinoline;-   5-di(acetyl)amino-4-hydroxy-2-methoxycarbonylquinoline;-   5-acetylamino-4-hydroxy-2-methoxycarbonylquinoline;-   5,7-dichloro-4-hydroxy-2-methoxycarbonylquinoline;-   6-chloro-4-hydroxy-2-methoxycarbonylquinoline;-   6-nitro-4-hydroxy-2-methoxycarbonylquinoline;-   6-amino-4-hydroxy-2-methoxycarbonylquinoline;-   7-benzyloxy-4-hydroxy-2-methoxycarbonylquinoline;-   4,7-dihydroxy-2-methoxycarbonylquinoline;-   7-prop-1-oxy-4-hydroxy-2-methoxycarbonylquinoline;-   7-carboxymethoxy-4-hydroxy-2-methoxycarbonylquinoline;-   7-diethylaminoethoxy-4-hydroxy-2-methoxycarbonylquinoline;-   7-methoxy-4-hydroxy-2-methoxycarbonylquinoline;-   7-(2-(4-hydroxy-2-carboxypyrrolidinyl)ethoxy)-4-hydroxy-2-methoxycarbonylquinoline;-   8-methyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-diethylaminomethyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-benzyloxy-4-hydroxy-2-methoxycarbonylquinoline;-   4,6-dihydoxy-2-methoxycarbonylquinoline;-   6-carboxymethoxy-4-hydroxy-2-methoxycarbonylquinoline;-   6-ethoxy-4-hydroxy-2-methoxycarbonylquinoline;-   6-methoxy-4-hydroxy-2-methoxycarbonylquinoline;-   6-prop-2-oxy-4-hydroxy-2-methoxycarbonylquinoline;-   7-fluoro-4-hydroxy-2-methoxycarbonylquinoline;-   7-trifluoromethyl-4-hydroxy-2-methoxycarbonylquinoline;-   7-hydroxymethyl-4-hydroxy-2-methoxycarbonylquinoline;-   7-cyano-4-hydroxy-2-methoxycarbonylquinoline;-   7-nitro-4-hydroxy-2-methoxycarbonylquinoline;-   6-carboxy-4-hydroxy-2-methoxycarbonylquinoline;-   7-trifluoromethoxy-4-hydroxy-2-methoxycarbonylquinoline;-   6-trifluoromethoxy-4-hydroxy-2-methoxycarbonylquinoline;-   7-acetyl-4-hydroxy-2-methoxycarbonylquinoline;-   5-ethoxycarbonyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-ethyl-4-hydroxy-2-methoxycarbonylquinoline;-   7-carboxy-4-hydroxy-2-methoxycarbonylquinoline;-   6-aminocarbonyl-4-hydroxy-2-methoxycarbonylquinoline;-   6,7-dimethoxy-4-hydroxy-2-methoxycarbonylquinoline;-   6-chloro-7-methyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-fluoro-7-methyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-fluoro-4-hydroxy-2-methoxycarbonylquinoline;-   6-fluoro-7-chloro-4-hydroxy-2-methoxycarbonylquinoline;-   7-bromo-4-hydroxy-2-methoxycarbonylquinoline;-   6,7-dimethyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-methoxy-7-methyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-methoxy-7-chloro-4-hydroxy-2-methoxycarbonylquinoline;-   6-chloro-8-fluoro-4-hydroxy-2-methoxycarbonylquinoline;-   6,7-dichloro-4-hydroxy-2-methoxycarbonylquinoline;-   6,8-difluoro-4-hydroxy-2-methoxycarbonylquinoline;-   6,7-difluoro-4-hydroxy-2-methoxycarbonylquinoline;-   6-dimethylamino-4-hydroxy-2-methoxycarbonylquinoline;-   5-fluoro-6-methyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-methyl-7-chloro-4-hydroxy-2-methoxycarbonylquinoline;-   6-acetyl-4-hydroxy-2-methoxycarbonylquinoline;-   6-methylthio-4-hydroxy-2-methoxycarbonylquinoline;-   4,5-dihydroxy-2-methoxycarbonylquinoline;-   7-ethyl-4-hydroxy-2-methoxycarbonylquinoline;-   5-methyl-4-hydroxy-2-methoxycarbonylquinoline;-   5-hydroxymethoxy-4-hydroxy-2-methoxycarbonylquinoline;-   5-(3-ethoxycarbonylpropoxy)-4-hydroxy-2-methoxycarbonylquinoline;    and-   5-(3-carboxypropoxy)-4-hydroxy-2-methoxycarbonylquinoline.

Preparation 3 Compounds of Formula (H)

A. 7-methyl-4-hydroxy-2-methoxycarbonylquinoline (6.45 g, 30.14 mmol)was suspended in MeOH (150 mL) and water (100 mL), and LiOH (3.08 g,75.5 mmol) was added and stirred at ambient temperature for 2 hours. Themethanol was evaporated in vacuo and residue was crystallized byaddition of 2N hydrochloric acid. The resulting solid was filtered,washed with water and dried to afford7-methyl-4-hydroxy-2-carboxyquinoline (6.0 g, 98%), NMR (DMSO-d₆) 2.40(s, 3), 6.68 (s, 1), 7.22 (d, 1), 7.68 (s, 1), 7.96 (d, 1).

B. In a similar manner, the following compounds of formula (H) wereprepared:

-   8-methoxy-4-hydroxy-2-carboxyquinoline;-   5-amino-4-hydroxy-2-carboxyquinoline;-   5-nitro-4-hydroxy-2-carboxyquinoline;-   5-carboxymethylamino-4-hydroxy-2-carboxyquinoline;-   7-chloro-4-hydroxy-2-carboxyquinoline;-   5-di(acetyl)amino-4-hydroxy-2-carboxyquinoline;-   5-acetylamino-4-hydroxy-2-carboxyquinoline;-   5,7-dichloro-4-hydroxy-2-carboxyquinoline;-   6-chloro-4-hydroxy-2-carboxyquinoline;-   6-nitro-4-hydroxy-2-carboxyquinoline;-   6-amino-4-hydroxy-2-carboxyquinoline;-   7-benzyloxy-4-hydroxy-2-carboxyquinoline;-   4,7-dihydroxy-2-carboxyquinoline;-   7-pro-1-poxy-4-hydroxy-2-carboxyquinoline;-   7-carboxymethoxy-4-hydroxy-2-carboxyquinoline;-   7-diethylaminoethoxy-4-hydroxy-2-carboxyquinoline;-   7-methoxy-4-hydroxy-2-carboxyquinoline;-   7-(2-(4-hydroxy-2-carboxypyrrolidinyl)ethoxy)-4-hydroxy-2-carboxyquinoline;-   8-methyl-4-hydroxy-2-carboxy quinoline;-   6-diethylaminomethyl-4-hydroxy-2-carboxyquinoline;-   3-methyl-4-hydroxy-2-carboxyquinoline;-   6-benzyloxy-4-hydroxy-2-carboxyquinoline;-   4,6-dihydoxy-2-carboxyquinoline;-   6-carboxymethoxy-4-hydroxy-2-carboxyquinoline;-   6-ethoxy-4-hydroxy-2-carboxyquinoline;-   6-methoxy-4-hydroxy-2-carboxyquinoline;-   6-prop-2-oxy-4-hydroxy-2-carboxyquinoline;-   7-fluoro-4-hydroxy-2-carboxyquinoline;-   7-trifluoromethyl-4-hydroxy-2-carboxyquinoline;-   7-hydroxymethyl-4-hydroxy-2-carboxyquinoline;-   7-cyano-4-hydroxy-2-carboxyquinoline;-   7-nitro-4-hydroxy-2-carboxyquinoline;-   2,6-dicarboxy-4-hydroxyquinoline;-   7-trifluoromethoxy-4-hydroxy-2-carboxyquinoline;-   6-trifluoromethoxy-4-hydroxy-2-carboxyquinoline;-   7-acetyl-4-hydroxy-2-carboxyquinoline;-   5-ethoxycarbonyl-4-hydroxy-2-carboxyquinoline;-   6-ethyl-4-hydroxy-2-carboxyquinoline;-   2,7-dicarboxy-4-hydroxyquinoline;-   6-aminocarbonyl-4-hydroxy-2-carboxyquinoline;-   6,7-dimethoxy-4-hydroxy-2-carboxyquinoline;-   6-methyl-7-chloro-4-hydroxy-2-carboxyquinoline;-   6-chloro-7-methyl-4-hydroxy-2-carboxyquinoline;-   6-fluoro-7-methyl-4-hydroxy-2-carboxyquinoline;-   6-fluoro-4-hydroxy-2-carboxyquinoline;-   6-fluoro-7-chloro-4-hydroxy-2-carboxyquinoline;-   7-bromo-4-hydroxy-2-carboxyquinoline;-   6,7-dimethyl-4-hydroxy-2-carboxyquinoline;-   6-methoxy-7-methyl-4-hydroxy-2-carboxyquinoline;-   6-methoxy-7-chloro-4-hydroxy-2-carboxyquinoline;-   6-chloro-8-fluoro-4-hydroxy-2-carboxyquinoline;-   6,7-dichloro-4-hydroxy-2-carboxyquinoline;-   6,8-difluoro-4-hydroxy-2-carboxyquinoline;-   6,7-difluoro-4-hydroxy-2-carboxyquinoline;-   6-dimethylamino-4-hydroxy-2-carboxyquinoline;-   5-fluoro-6-methyl-4-hydroxy-2-carboxyquinoline;-   6-acetyl-4-hydroxy-2-carboxyquinoline;-   6-methylthio-4-hydroxy-2-carboxyquinoline;-   4,5-dihydroxy-2-carboxyquinoline;-   5-hydroxymethoxy-4-hydroxy-2-carboxyquinoline;-   7-methyl-4-hydroxy-2-carboxyquinoline;-   5-methyl-4-hydroxy-2-carboxyquinoline;-   5-(3-ethoxycarbonylpropoxy)-4-hydroxy-2-carboxyquinoline; and-   5-(3-carboxypropoxy)-4-hydroxy-2-carboxyquinoline.

Preparation 4 Compounds of Formulae (Fb), (Ga) and (Gb)

A. To a solution of SnCl₂.H₂O (140 g, 0.62 mol) in ethanol (350 mL) wasadded a solution of 2,6-dichloro-3-nitrotoluene (25 g, 0.12 mol) inethanol (50 mL). The reaction mixture was refluxed for 1 hour. Thereaction mixture was concentrated under reduced pressure. The residuewas dissolved in water (100 mL), pH was adjusted to approximately pH 12with 1N NaOH solution and extracted with ethyl acetate. The ethylacetate layer was washed with brine, dried over sodium sulfate, andconcentrated to afford 2,6-dichloro-3-aminotoluene (21 g, 98%); NMR(CDCl₃) 2.42 (s, 3), 6.62 (d, 1), 7.14 (d, 1) ppm.

B. To a solution of 2,6-dichloro-3-aminotoluene (20.5 g, 0.11 mol) inmethanol (300 mL) was added dimethyl acetylenedicarboxylate (15 mL, 0.12mol) and the reaction mixture was refluxed for 2 hours. The reactionmixture was concentrated under reduced pressure to a yellow solid.Diphenyl ether (350 mL) was heated to 230-240° C., and the yellow solidwas added to it. The temperature was maintained at 230-240° C. for 20minutes and the reaction mixture was cooled slowly to ambienttemperature and diluted with petroleum ether (1 L). The solid wasfiltered and washed with hot ethyl acetate to afford a brown solid,2-(methoxycarbonyl)-4-oxo-6,8-dichloro-7-methylquinoline (28.5 g, 85%);NMR (CDCl₃) 2.62 (s, 3), 4.04 (s, 3), 7.02 (s, 1), 8.24 (s, 1) ppm.

C. 2-(Methoxycarbonyl)-4-oxo-6,8-dichloro-7-methylquinoline (28.5 g,99.6 mmol) was suspended in methanol (1 L) and a solution of LiOH.H₂O(20.5 g, 0.5 mol) in water (200 mL) was added to the solution. Theresulting reaction mixture was stirred at ambient temperature for 0.5hours. Pd/C (5.8 g) was added to the reaction mixture and the resultingreaction mixture was shaken under 50 Psi hydrogen overnight. Thereaction mixture was filtered, concentrated under reduced pressure toremove methanol, diluted with water (300 mL) and the pH was adjusted tobetween pH 3 and pH 4 by 2N HCl. The precipitate was collected byfiltration, washed with water and dried to afford a white solid,2-carboxy-4-oxo-7-methylquinoline (20 g, 90%); NMR (DMSO-d₆) 2.40 (s,3), 6.60 (s, 1), 7.20 (d, 1), 7.68 (s, 1), 7.96 (d, 1) ppm.

Preparation 5 Compounds of Formulae (M) and (N)

A. To a solution of 2-aminonaphthalene (1.43 g, 10 mmol) in CH₂Cl₂ (15mL) and triethylamine (1 mL) was added a solution of ethyl malonylchloride (1.4 mL, 11 mmol) in CH₂Cl₂ (10 mL) dropwise at 5° C. Thereaction mixture was stirred at 10° C. After 1 hour the reaction wasdiluted with 100 mL CH₂Cl₂, washed with 2N NaHSO₄ and water, brine. Theorganic layer was evaporated in vacuo to afford2-((ethoxycarbonyl)methylcarbonylamino)naphthalene (2.3 g, 8.9 mmol) asa solid that was used without further purification.

B. To a solution of 2-((ethoxycarbonyl)methylcarbonylamino)naphthalene(2.3 g, 8.9 mmol) in MeOH (40 mL) was added a solution of LiOH (1.18 g,27 mmol) in water (40 mL). The reaction mixture was stirred at ambienttemperature. After 3 hours, the reaction mixture was acidified to pH 2-3by 2N NaHSO₄, then extracted with ethyl acetate (3×50 mL). The organiclayer was dried over Na₂SO₄ and evaporated in vacuo to afford2-((carboxy)methylcarbonyl-amino)naphthalene (2.0 g, 8.7 mmol) as asolid that was used in further preparations without furtherpurification.

Preparation 6 Compounds of Formula (S) and Formula (U)

A. To a solution of 1-ethoxycarbonylpiperazine (1.5 mL, 10 mmol) in 40mL CH₂Cl₂, was added triethylamine (2 mL, 14 mmol) and chloroacetylchloride (0.8 mL, 5.0 mmol) at 0° C. The resulting reaction mixture wasstirred at amibent temperature for 2 hours. The reaction mixture waswashed with water, 2N NaHSO₄ and brine, and dried over sodium sulfate.The solvent was evaporated in vacuo to afford1-ethoxycarbonyl-4-chloromethylcarbonylpiperazine (4.5 g) as an yellowoil, which was used without further purification.

B. To a solution of 1-ethoxycarbonyl-4-chloromethylcarbonylpiperazine(520 mg, 2.21 mmol) in DMF (40 mL) was added cesium carbonate (2.0 g,6.20 mmol) and glycine ethyl ester hydrochloride (310 mg, 2.21 mmol).The resulting reaction mixture was stirred at 50° C. After 1 hour, thereaction mixture was diluted with ethyl acetate (200 mL), washed withwater (3×150 mL) and brine, and concentrated in vacuo to afford1-ethoxycarbonyl-4-(ethoxycarbonylmethyl)aminomethylcarbonylpiperazineas an oil (520 mg), which was used without purification.

C. In a similar manner, other compounds of formula (S) and formula (U)are prepared.

Preparation 7 Compounds of Formula (X), Formula (Z) and Formula (AA)

A. To a solution of 2-aminonaphthalene (985 mg, 6.8 mmol) inN,N-dimethylformamide (DMF) (50 mL) was added potassium carbonate (1.806g, 13.6 mmol) and tert-butyl bromoacetate (1.4 mL, 9.9 mmol). Theresulting reaction mixture was stirred at ambient temperature. After 24hours, the reaction mixture was diluted with water (200 mL), thenextracted by ethyl acetate (150 mL). The organic layer was separated andwashed with water (3×100 mL), then dried over sodium sulfate. Thesolvent was evaporated in vacuo to afford a product as ann yellow oil.Purification of product by flash column on silica gel afforded2-((1,1-dimethylethoxycarbonyl)methyl)aminonaphthalene (1.2 g).

B. To a solution of2-((1,1-dimethylethoxycarbonyl)methyl)aminonaphthalene (926 mg, 3.6mmol) in CH₂Cl₂ (40 mL) was added triethylamine (3 mL, 21.5 mmol) andethyl 3-chloro-3-oxapropionate (1.3 mL, 10.1 mmol). The resultingreaction mixture was stirred at ambient temperature for 2 days. Thereaction mixture was washed with water and brine, and dried over sodiumsulfate. The solvent was evaporated in vacuo to afford a product as anyellow oil. Purification of the product by flash column on silica gelafforded2-[ethoxycarbonylmethylcarbonyl][(1,1-dimethylethoxycarbonyl)methyl]aminonaphthalene(730 mg) as a clear oil.

C. To a solution of2-[ethoxycarbonylmethylcarbonyl][(1,1-dimethylethoxycarbonyl)methyl]aminonaphthalene(730 mg, 1.95 mmol) in methanol (5.0 mL) was added a solution of LiOH(123 mg, 2.91 mmol) in water (3.0 mL). The resulting reaction mixturewas stirred at ambient temperature for 1 hour. The reaction mixture wasacidified by 2N NaHSO₄ to pH 3, then extracted by ethyl acetate (3×10mL). The organic layer was evaporated in vacuo to afford2-[carboxymethylcarbonyl][(1,1-dimethylethoxycarbonyl)methyl]aminonaphthalene(270 mg) as a white solid.

D. In a similar manner, other compounds of formula (X), formula (Z) andformula (AA) are prepared.

EXAMPLE 1 Compounds of Formula (Ia)

A. To a suspension of 7-methyl-4-hydroxy-2-carboxyquinoline (0.81 g, 4mmol) in methylene chloride: DMF (4:1, 25 mL) was added1-hydoxybenzotriazole (HOBT) (0.64 g, 4.8 mmol) and1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) (1.09 g, 4.8 mmol)and the reaction mixture was stirred for 10 minutes. A solution of4-ethoxycarbonyl-1-(1-amino-3-(1,1-dimethylethoxycarbonyl)propyl)carbonylpiperazine(1.37 g, 4 mmol) in methylene chloride (10 mL) was added to the reactionmixture and the resulting mixture was stirred at ambient temperature for6 hours. The solvent was evaporated in vacuo and the resulting residuewas partitioned in ethyl acetate and water. The organic layers werecombined and washed with water, brine and concentrated to afford anoff-white foam,2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-hydroxyquinoline;(1.44 g, 68%).

B. In a similar manner, other compounds of formula (Ia) are prepared.

EXAMPLE 2 Compounds of Formula (Ib)

A. 1-Ethoxycarbonyl-1-bromocyclobutane (0.62 g, 3.03 mmol) was added toa solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-hydroxyquinoline(0.8 g, 1.52 mmol) and cesium carbonate (1.00 g, 3.03 mmol) inN,N-dimethylformamide (DMF) (15 mL) and stirred at 90-100° C. At every 2hours, excess equimolar amounts of 1-ethoxycarbonyl-1-bromocyclobutaneand cesium carbonate were added to the solution to a total of 8equivalents of each reagent. After 10 hours, the reaction mixture wasfiltered, the solvent was evaporated and the residue was purified bypreparative HPLC to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]amino-carbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline(0.45 g, 38%) as a white solid (TFA salt); NMR (DMSO-d₆) 1.04 (t, 3),1.14 (t, 3), 1.32 (s, 9), 1.82 (m, 1), 2.00 (m, 3), 2.26 (m, 2), 2.52(s, 3), 2.58 (m, 2), 2.78 (m, 2), 3.5 (m, 8), 4.04 (q, 2), 4.15 (q, 2),5.00 (m, 1), 6.94 (s, 1), 7.52 (d, 1), 7.88 (s, 1), 8.14 (d, 1), 8.84(d, 1) ppm.

B. A solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline(75 mg, 0.09 mmol) in 50% trifluoroacetic acid-methylene chloride (2 ml)was stirred at ambient temperature for 1 hour. The solvent wasevaporated in vacuo and the resulting residue was purified bypreparative HPLC to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinolineas a white solid (60 mg, 93%, trifluoroacetic acid salt); NMR (DMSO-d₆)1.03 (t, 3), 1.16 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.26 (m, 2), 2.55(s, 3), 2.59 (m, 2), 2.77 (m, 2), 3.38 (m, 6), 3.60 (m, 2), 4.02 (q, 2),4.12 (q, 2), 4.98 (m, 1), 6.92 (s, 1), 7.52 (d, 1), 7.88 (s, 1), 8.14(d, 1), 8.85 (d, 1) ppm.

C. A solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline(220 mg, 0.29 mmol) in 50% trifluoroacetic acid-methylene chloride (6mL) was stirred at ambient temperature for 1 hour. The solvent wasevaporated in vacuo and the residue was dissolved in methanol (5 ml).LiOH (5 mL, 0.025 M) was added and the reaction stirred for 3 hours. Thesolvent was evaporated and the residue was purified by preparative HPLCto afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline,as a white solid (190 mg, 95%, trifluoroacetic acid salt); NMR (DMSO-d₆)1.15 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.30 (m, 2), 2.51 (s, 3), 2.56(m, 2), 2.68 (m, 2), 3.40 (m, 6), 3.62 (m, 2), 4.00 (q, 2), 4.98 (m, 1),6.98 (s, 1), 7.52 (dd, 1), 7.88 (s, 1), 8.14 (d, 1), 8.85 (d, 1) ppm.

D. In a similar manner as described above in Paragraphs A-C, thefollowing compounds were made:

-   2-[(4-(1,1-dimethylethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.40 (s, 9), 3.30-3.50 (m, 8), 4.10 (S, 3), 4.24 (d,    2), 7.60 (S, 3), 7.64 (t, 1), 7.82 (t, 1), 8.03 (d, 1), 8.20 (d, 1),    8.94 (t, 1) ppm;-   2-[(piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 2.60-2.70 (m, 4), 3.35-3.41 (m, 4), 7.58 (s, 3), 7.63    (t, 1), 7.82 (t, 1), 8.03 (d, 1), 8.18 (d, 1), 8.93 (t, 1) ppm;-   2-[(2-methyl-4-(4-fluorobenzyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.16-1.34 (m, 3), 1.80-2.20 (m, 2), 2.60-2.90 (m, 3),    3.40-3.70 (m, 3), 4.12 (m, 5), 4.20-4.50 (m, 1), 7.16 (m, 2), 7.34    (m, 2), 7.60 (s, 1), 7.63 (t, 1), 7.83 (t, 1), 8.03 (d, 1), 8.20 (d,    1), 8.93 (m, 1) ppm;-   2-[(3-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.02-1.21 (m, 6), 2.60-3.20 (m, 3), 3.70-3.90 (m, 2),    4.05 (m, 2), 4.13 (s, 3), 4.17-4.40 (m, 4), 7.60 (s, 2), 7.63 (t,    1), 7.83 (t, 1), 8.04 (d, 1), 8.18 (d, 1), 8.97 (m, 1) ppm, and NMR    (CDCl₃) 1.30 (m, 6), 2.80-3.20 (m, 3), 3.40 (m, 1), 3.60 (m, 1),    4.00-4.40 (m, 9), 7.55 (m, 1), 7.65 (s, 1), 7.70 (t, 1), 8.10 (d,    1), 8.20 (d, 1), 9.10 (m, 1) ppm;-   2-[(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.03-1.15 (d, 3), 1.18 (t, 3), 2.8-3.2 (m, 3), 3.7-4.0    (m, 2), 4.06 (q, 2), 4.10 (s, 3), 4.15-4.60 (m, 4), 7.6 (s, 1), 7.63    (t, 1), 7.83 (t, 1), 8.04 (d, 1), 8.19 (d, 1), 8.96 (m, 1) ppm;-   2-[(4-(2-methylpropoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.88 (d, 6), 1.86 (m, 1), 3.30-3.50 (m, 8), 3.78 (d,    2), 4.12 (s, 3), 4.25 (d, 2), 7.58 (s, 1), 7.65 (t, 1), 7.84 (t, 1),    8.06 (d, 1), 8.18 (d, 1), 8.95 (t, 1) ppm;-   2-[(4-(trichloromethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 3.50-3.75 (m, 8), 4.10 (s, 3), 4.26 (d, 2), 7.58 (s,    1), 7.64 (t, 1), 7.83 (t, 1), 8.05 (d, 1), 8.18 (d, 1), 8.94 (t, 1)    ppm;-   2-[(4-(benzyloxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 3.35-3.54 (m, 8), 4.10 (s, 3), 4.26 (d, 2), 5.07 (s,    2), 7.10-7.20 (m, 5), 7.58 (s, 1), 7.64 (t, 1), 7.83 (t, 1), 8.05    (d, 1), 8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-(1-chloroethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.78 (d, 3), 3.40-3.60 (m, 8), 4.10 (s, 3), 4.26 (d,    2), 6.58 (q, 1), 7.60 (s, 1), 7.64 (t, 1), 7.84 (t, 1), 8.06 (d, 1),    8.19 (d, 1), 8.95 (t, 1) ppm;-   2-[(4-(methoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 3.30-3.52 (m, 8), 3.60 (s, 3), 4.10 (s, 3), 4.26 (d,    2), 7.60 (s, 1), 7.65 (t, 1), 7.83 (t, 1), 8.06 (d, 1), 8.18 (d, 1),    8.94 (t, 1) ppm;-   2-[(4-(phenoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 3.40-3.70 (m, 8), 4.10 (s, 3), 4.30 (d, 2), 7.13 (d,    1), 7.22 (t, 1), 7.38 (t, 1), 7.60 (s, 1), 7.64 (t, 1), 7.83 (t, 1),    8.06 (d, 1), 8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(2-methyl-4-benzylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.16-1.34 (m, 3), 1.80-2.20 (m, 2), 2.60-2.90 (m, 3),    3.40-3.70 (m, 3), 4.12 (m, 5), 4.20-4.50 (m, 1), 7.16 (m, 2), 7.34    (m, 2), 7.60 (s, 1), 7.63 (t, 1), 7.83 (t, 1), 8.03 (d, 1), 8.20 (d,    1), 8.93 (m, 1) ppm, and NMR (CDCl₃) 1.40 (m, 3), 2.10 (m, 1), 2.20    (m, 1), 2.70 (m, 1), 2.90 (m, 1), 3.40-3.60 (m, 3), 4.0 (m, 1), 4.10    (s, 3), 4.20-4.40 (m, 3), 7.20-7.40 (m, 5), 7.60 (m, 1), 7.65 (s,    1), 7.70 (m, 1), 8.10 (d, 1), 8.20 (d, 1), 9.15 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonylethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.26 (t, 3), 1.52 (d, 3), 3.60 (m, 8H), 3.36 (m, 4),    4.12 (s, 3), 4.18 (q, 2), 5.16 (m, 1), 7.56 (t, 1), 7.66 (s, 1),    7.72 (t, 1), 8.08 (d, 1), 8.20 (d, 1H), 9.06 (d, 1) ppm, and NMR    (CDCl₃) 1.28 (t, 3), 1.52 (d, 3), 3.40-3.96 (m, 8), 4.12 (s, 3),    4.18 (q, 2), 5.16 (m, 1), 7.56 (t, 1), 7.66 (s, 1), 7.74 (t, 1),    8.10 (d, 1), 8.20 (d, 1H), 9.06 (d, 1) ppm;-   2-[(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (m, 6), 2.80-3.10 (m, 3), 3.40 (m, 1), 3.60 (m, 1),    4.00-4.40 (m, 9), 7.55 (m, 1), 7.65 (s, 1), 7.78 (m, 1), 8.10 (d,    1), 8.20 (d, 1), 9.10 (m, 1) ppm;-   2-[(4-(2-methyl-5-chlorophenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 2.20 (s, 3), 2.85 (m, 4), 3.60 (m, 4), 4.10 (s, 3),    4.30 (m, 2), 7.0 (m, 1), 7.20 (m, 1), 7.60 (s, 1), 7.65 (m, 1), 7.80    (m, 1), 8.05 (d, 1), 8.20 (d, 1), 8.95 (m, 1) ppm;-   2-[(4-benzylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 2.30-2.43 (m, 4), 3.40-3.56 (m, 6), 4.10 (s, 3), 4.23    (d, 2), 7.20-7.16 (m, 5), 7.60 (s, 1), 7.65 (t, 1), 7.83 (t, 1),    8.06 (d, 1), 8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-ethylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.98 (t, 3), 2.30-2.40 (m, 6), 3.48 (m, 4), 4.12 (s,    3), 4.22 (d, 2), 7.59 (s, 1), 7.64 (t, 1), 7.83 (t, 1), 8.04 (d, 1),    8.18 (d, 1), 8.96 (t, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-((2-chlorobenzyloxy)carbonyl)amino-pentyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.25 (t, 3), 1.40-2.00 (m, 8), 3.20-3.80 (m, 8), 4.10    (s, 3), 4.15 (q, 2), 4.95 (m, 1), 5.20 (m, 2), 7.21 (m, 2), 7.38 (m,    2), 7.55 (m, 1), 7.63 (s, 1), 7.75 (m, 1), 8.05 (d, 1), 8.20 (d, 1),    8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxycarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.25 (t, 3), 2.81 (m, 1), 3.20 (m, 1), 3.40-3.65 (m, 8),    4.15 (m, 5), 5.15 (m, 2), 5.60 (m, 1), 7.30 (m, 5), 7.55 (m, 1),    7.75 (m, 1), 8.00 (d, 1), 8.20 (d, 1), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.25 (t, 3), 2.05 (m, 1), 2.25 (m, 1), 2.45-2.65 (m, 2),    3.40-3.80 (m, 8), 4.10-4.20 (m, 5), 5.15 (m, 2), 5.23 (m, 1), 7.35    (m, 5), 7.55 (dd, 1), 7.63 (s, 1), 7.75 (dd, 1), 8.05 (dd, 1), 8.20    (dd, 1), 9.00 (dd, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-phenylethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 2.63 (m, 1), 3.05 (m, 2), 3.20 (m, 4), 3.30    (m, 2), 3.45 (m, 2), 3.62 (m, 1), 4.15 (m, 5), 5.38 (m, 1), 7.30 (m,    5), 7.56 (d, 1), 7.75 (dd, 1), 8.05 (d, 1), 8.20 (d, 1), 8.98 (m, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxy)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 3.23 (m, 8), 3.80 (m, 2), 4.15 (m, 5), 4.58    (d, 2), 5.40 (m, 1), 7.24 (m, 5), 7.55 (dd, 1), 7.62 (s, 3), 7.75    (dd, 1), 8.05 (d, 1), 8.20 (dd, 1), 8.98 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-methylpropyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.05 (m, 6), 1.30 (m, 3), 2.20 (m, 1), 3.40-3.80 (m, 8),    4.15-4.20 (m, 5), 5.0 (m, 1), 7.58 (m, 1), 7.65 (s, 1), 7.78 (m, 1),    8.05 (d, 1), 8.20 (d, 1), 8.90 (m, 1) ppm;-   2-[(4-(1,1-dimethylethoxy)carbonylmethylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.39 (s, 9), 2.50-2.60 (m, 4), 3.16 (s, 2), 3.47 (m,    4), 4.12 (s, 3), 4.22 (d, 2), 7.59 (s, 1), 7.64 (t, 1), 7.83 (t, 1),    8.04 (d, 1), 8.18 (d, 1), 8.96 (t, 1) ppm;-   2-[(4-(methoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 2.50-2.60 (m, 4), 3.26 (m, 2), 3.47 (m, 4), 3.60 (s,    3), 4.14 (s, 3), 4.23 (d, 2), 7.59 (s, 1), 7.64 (t, 1), 7.83 (t, 1),    8.04 (d, 1), 8.18 (d, 1), 8.96 (t, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 2.82 (dd, 1), 3.18 (dd, 1), 3.40-3.75 (m,    8), 4.14 (m, 5), 5.58 (m, 1), 7.58 (dd, 1), 7.80 (s, 1), 7.73 (dd,    1), 8.01 (d, 1), 8.20 (d, 1), 8.98 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 1.99 (m, 1), 2.23 (m, 1), 2.41-2.63 (m, 2),    3.40-3.82 (m, 8), 4.10 (s, 3), 4.15 (q, 2), 5.35 (m, 1), 7.58 (dd,    1), 7.62 (s, 1), 7.73 (dd, 1), 8.08 (d, 1), 8.19 (d, 1), 9.15 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-aminopentyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.22 (t, 3), 2.85 (dd, 1), 3.17 (dd, 1), 3.40-3.75 (m,    8), 4.15 (m, 5), 5.58 (m, 1), 7.56 (dd, 1), 7.61 (s, 1), 7.75 (dd,    1), 8.05 (d, 1), 8.20 (d, 1), 8.98 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-hydroxyethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 3.40-3.80 (m, 8), 3.92 (m, 1), 4.03 (m, 1),    4.15 (m, 5), 5.20 (m, 1), 7.58 (d, 1), 7.63 (s, 1), 7.75 (dd, 1),    8.05 (d, 1), 8.21 (d, 1), 9.15 (dd, 1) ppm;-   2-[(4-(carboxymethyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 2.48-2.60 (m, 4), 3.17 (s, 2), 3.46 (m, 4), 4.08 (s,    3), 4.18 (d, 2), 7.56 (s, 1), 7.62 (t, 1), 7.80 (t, 1), 8.01 (d, 1),    8.16 (d, 1), 8.92 (t, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(ethoxycarbonyl)methoxyquinoline;    NMR (DMSO-d₆) 1.20 (m, 6), 3.3-3.5 (m, 8), 4.04 (q, 2), 4.2-4.3 (m,    4), 5.3 (s, 2), 7.5 (s, 1), 7.7 (t, 1), 7.8 (t, 1), 8.1 (d, 1), 8.13    (d, 1), 8.98 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(carboxy)methoxyquinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 3.3-3.5 (m, 8), 4.04 (q, 2), 4.25 (d, 2),    5.1 (s, 2), 7.5 (s, 1), 7.7 (t, 1), 7.85 (t, 1), 8.03 (d, 1), 8.13    (d, 1), 8.95 (m, 1) ppm;-   2-[(4-methylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 2.58 (s, 3), 2.71-7.93 (m, 4), 3.67 (m, 4), 4.13 (s,    3), 4.26 (d, 2), 7.60 (s, 1), 7.66 (t, 1), 7.84 (t, 1), 8.06 (d, 1),    8.21 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-ethoxyquinoline;    NMR (DMSO-d₆) 1.21 (t, 3), 1.48 (t, 3), 3.30-3.60 (m, 8), 4.06 (q,    2), 4.28 (d, 2), 4.42 (q, 2), 7.57 (s, 1), 7.66 (t, 1), 7.85 (t, 1),    8.07 (d, 1), 8.21 (d, 1), 8.95 (t, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(aminocarbonyl)methoxyquinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 3.30-3.50 (m, 8), 4.05 (q, 2), 4.25 (d,    2), 4.90 (s, 2), 7.50 (s, 1), 7.70 (t, 1), 7.86 (t, 1), 8.03 (d, 1),    8.40 (d, 1), 8.95 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 2.80 (dd, 1), 3.00 (dd, 1), 3.40-3.80 (m,    8), 4.15 (m, 5), 5.60 (m, 2), 6.15 (m, 1), 7.60 (m, 2), 7.75 (m, 1),    8.0 (d, 1), 8.20 (d, 1), 9.0 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 2.0 (m, 1), 2.20-2.50 (m, 3), 3.40-3.80 (m,    8), 4.15 (m, 5), 5.20 (m, 1), 5.50 (m, 1), 6.25 (m, 1), 7.60 (m, 2),    7.75 (m, 1), 8.10 (d, 1), 8.20 (d, 1), 9.20 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(imidazol-4-yl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.25 (t, 3), 3.10-3.30 (m, 2), 3.20-3.65 (m, 8), 4.10    (m, 5), 5.40 (m, 1), 6.90 (s, 1), 7.55-7.60 (m, 3), 7.70 (t, 1),    8.02 (d, 1), 8.20 (d, 1), 9.0 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(indol-3-yl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.20 (t, 3), 2.25 (m, 1), 2.90 (m, 2), 3.20 (m, 2), 3.40    (m, 4), 3.60 (m, 1), 4.05 (q, 2), 4.15 (s, 3), 5.50 (m, 1), 7.20 (m,    3), 7.35 (d, 1), 7.55 (m, 1), 7.70 (s, 1), 7.80 (m, 2), 8.10 (d, 1),    8.20 (m, 2), 9.10 (d, 1) ppm;-   2-[(3-(benzyloxy)carbonyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.28 (m, 3), 2.82 (m, 1), 3.28 (m, 3), 3.88 (m, 1), 4.18    (s, 3), 4.22 (m, 4), 4.60 (m, 3), 5.20 (m, 2), 7.42 (m, 1), 7.22 (m,    2), 7.28 (m, 3), 7.60 (t, 1), 7.64 (s, 1), 7.68 (t, 1), 8.12 (d, 1),    8.22 (d, 1H), 9.18 (s, 1) ppm;-   2-[(3-carboxy-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.28 (m, 3), 2.82 (m, 1), 3.26 (m, 4H), 3.88 (m, 1),    4.12 (s, 3), 4.46 (m, 5), 7.42 (m, 1), 7.56 (s, 1), 7.64 (t, 1),    8.00 (d, 1), 8.20 (d, 1), 9.18 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxycarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (m, 3), 2.85 (dd, 1), 3.20 (m, 1), 3.40-3.80 (m,    8), 4.15 (m, 5), 5.15 (m, 2), 5.60 (m, 1), 7.35 (m, 5), 7.59 (m, 1),    7.62 (m, 1), 7.75 (m, 1), 8.05 (m, 1), 8.21 (m, 1), 8.90 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-4-(1,1-dimethylethoxy)carbonylbutyl]-aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.25 (t, 3), 1.22 (s, 9), 1.70-2.00 (m, 6), 2.30 (dd,    1), 3.40-3.80 (m, 8), 4.15 (m, 5), 5.18 (m, 1), 7.55 (d, 1), 7.62    (s, 1), 7.75 (dd, 1), 8.05 (d, 1), 8.20 (d, 1), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-4-carboxybutyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.30-1.90 (m, 6), 2.25 (m, 2), 3.25-3.63    (m, 8), 4.05 (m, 2), 4.15 (s, 3), 5.05 (m, 1), 7.61 (s, 1), 7.65    (dd, 1), 7.85 (dd, 1), 8.10 (d, 1), 8.20 (d, 1), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.30-1.90 (m, 6), 2.25 (m, 2), 3.25-3.63    (m, 8), 4.05 (m, 2), 4.15 (s, 3), 5.05 (m, 1), 7.61 (s, 1), 7.65    (dd, 1), 7.85 (dd, 1), 8.10 (d, 1), 8.20 (d, 1), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-hydroxyquinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.83 (m, 1), 1.92 (m, 1), 2.24 (m, 2),    3.30-3.70 (m, 8), 4.03 (q, 2), 4.93 (m, 1), 6.94 (s, 1), 7.35 (t,    1), 7.64 (t, 1), 7.86 (d, 1), 8.09 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-ethoxyquinoline;    NMR (DMSO-d₆) 1.16 (t, 3), 1.46 (t, 3), 1.85 (m, 1), 2.10 (m, 1),    2.45 (m, 2), 3.3-3.6 (m, 8), 4.02 (q, 2), 4.37 (q, 2), 5.00 (s, 2),    5.05 (m, 1), 7.30 (m, 5), 7.53 (s, 1), 7.63 (t, 1), 7.80 (t, 1),    8.04 (d, 1), 8.17 (d, 1), 9.90 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-ethoxyquinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.46 (t, 3), 1.82 (m, 1), 2.00 (m, 1),    2.30 (m, 2), 3.3-3.7 (m, 8), 4.00 (q, 2), 4.40 (q, 2), 5.04 (m, 1),    7.53 (s, 1), 7.63 (t, 1), 7.80 (t, 1), 8.04 (d, 1), 8.20 (d, 1),    9.90 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 2.05 (m, 1), 2.23 (m, 1), 2.58 (m, 2),    3.40-3.80 (m, 8), 4.15 (s, 3), 4.16 (q, 2), 5.17 (m, 1), 5.25 (m,    1), 7.15 (m, 5), 7.56 (dd, 1), 7.62 (s, 1), 7.75 (dd, 1), 8.0 (d,    1), 8.21 (d, 1), 9.05 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 2.00 (m, 1), 2.23 (m, 1), 2.41-2.63 (m, 2),    3.40-3.82 (m, 8), 4.12 (s, 3), 4.15 (q, 2), 5.35 (m, 1), 7.58 (dd,    1), 7.60 (s, 1), 7.75 (dd, 1), 8.10 (d, 1), 8.20 (d, 1), 9.19 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-((1,1-dimethylethoxy)carbonyl)ethyl]-aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 1.45 (s, 9), 2.78 (dd, 1), 2.99 (s, 3),    3.10 (m, 1), 3.40-3.82 (m, 8), 4.18 (q, 2), 4.20 (s, 3), 5.95 (m,    1), 7.05 (s, 1), 7.65 (dd, 1), 7.90 (dd, 1), 8.30 (m, 2) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 2.20-2.40 (m, 2), 2.50-2.82 (m, 2), 3.02    (s, 3), 3.30-3.80 (m, 8), 4.03 (s, 3), 4.15 (q, 2), 5.15 (m, 2),    5.63 (m, 1), 7.00 (s, 1), 7.35 (m, 5), 7.55 (dd, 1), 7.75 (dd, 1),    7.98 (d, 1), 8.20 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl][methyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 2.17-2.35 (m, 2), 2.52 (m, 1), 3.03 (s, 3),    3.35 (m, 8), 4.05 (s, 3), 4.15 (q, 2), 5.62 (m, 1), 7.00 (s, 1), 7.5    (dd, 1), 7.73 (dd, 1), 8.05 (d, 1), 8.20 (d, 1) ppm;-   2-[1-(4-(1,1-dimethylethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.45 (s, 9), 2.01 (m, 1), 2.22 (m, 1), 2.40-2.60 (m, 2),    3.20-3.80 (m, 11), 4.12 (s, 3), 5.25 (m, 1), 7.58 (dd, 1), 7.62 (s,    1), 7.75 (dd, 1), 8.10 (d, 1), 8.21 (d, 1), 9.05 (d, 1) ppm;-   2-[(4-(2-carboxyethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 2.40-2.60 (m, 4), 3.41-3.60 (m, 8), 4.13 (s, 3), 4.27    (d, 2), 7.61 (s, 1), 7.64 (t, 1), 7.83 (t, 1), 8.05 (d, 1), 8.23 (d,    1), 8.97 (t, 1) ppm;-   2-[(4-(5-(ethoxycarbonyl)pentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.25 (t, 3), 1.38 (m, 2), 1.60-1.78 (m, 6), 2.36 (m, 4),    3.51-3.78 (m, 8), 4.11 (m, 5), 4.27 (d, 2), 7.57 (t, 1), 7.65 (s,    1), 7.76 (t, 1), 8.09 (d, 1), 8.23 (d, 1), 9.12 (m, 1) ppm;-   2-[(4-(5-carboxypentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.24 (m, 2), 1.43 (m, 4), 2.13 (m, 2), 2.27 (m, 2),    3.40-3.52 (m, 8), 4.08 (s, 3), 4.24 (d, 2), 7.56 (s, 1), 7.63 (t,    1), 7.79 (t, 1), 8.01 (d, 1), 8.17 (d, 1), 8.92 (m, 1) ppm;-   2-[(2,4-di(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(2-carboxy-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxy)methoxyquinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.84 (m, 1), 2.04 (m, 1), 2.30 (m, 2),    3.31-3.71 (m, 8), 4.03 (q, 2), 5.05 (m, 1), 5.13 (s, 2), 7.47 (s,    1), 7.68 (t, 1), 7.85 (t, 1), 8.09 (d, 1), 8.23 (d, 1), 8.95 (d, 1)    ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-n-propoxyquinoline;    NMR (DMSO-d₆) 1.06 (t, 3), 1.17 (t, 3), 1.90 (m, 2), 3.30-3.55 (m,    8), 4.04 (q, 2), 4.25 (d, 2), 4.30 (q, 2), 7.57 (s, 1), 7.64 (t, 1),    7.84 (t, 1), 8.03 (d, 1), 8.20 (d, 1), 8.93 (m, 1) ppm;-   2-[1-(piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 2.00 (m, 1), 2.25 (m, 1), 2.40-2.60 (m, 2), 2.90 (m, 1),    2.95 (m, 1), 3.60-3.75 (m, 7), 4.12 (s, 3), 5.22 (m, 1), 7.55 (dd,    1), 7.63 (s, 1), 7.75 (dd, 1), 8.0 (d, 1), 8.21 (d, 1), 9.05 (d, 1)    ppm;-   2-[1-(4-(pyrimidin-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 2.02 (m, 1), 2.30 (m, 1), 2.40-2.62 (m, 2), 3.70 (s, 3),    3.80-5.04 (m, 8), 4.14 (s, 3), 5.30 (m, 1), 6.55 (m, 1), 7.55 (dd,    1), 7.62 (s, 1), 7.75 (dd, 1), 8.10 (d, 1), 8.21 (d, 1), 8.35 (d,    2), 9.05 (d, 1) ppm;-   2-[1-(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.38 (s, 9), 2.00 (m, 1), 2.23 (m, 1), 2.40-2.61 (m, 2),    3.25-3.80 (m, 11), 4.12 (s, 3), 2.25 (m, 1), 7.5 (dd, 1), 7.62 (s,    1), 7.75 (dd, 1), 8.07 (d, 1), 8.21 (d, 1), 9.01 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.25 (t, 3), 2.00 (m, 1), 2.22 (m, 1), 2.40-2.61 (m, 2),    3.40-3.80 (m, 11), 4.11 (s, 3), 4.17 (q, 2), 5.23 (m, 1), 7.56 (dd,    1), 7.62 (s, 1), 7.75 (dd, 1), 8.10 (d, 1), 8.21 (d, 1), 9.02 (d, 1)    ppm;-   2-[1-(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.38 (s, 9), 1.98 (m, 1), 2.22 (m, 1), 2.41-2.62 (m, 2),    3.33-3.90 (m, 8), 4.09 (s, 3), 4.11 (q, 2), 5.30 (m, 1), 7.5 (dd,    1), 7.58 (s, 1), 7.73 (dd, 1), 8.05 (d, 1), 8.11 (d, 1), 9.07 (d, 1)    ppm;-   2-[1-(4-(aminocarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 2.00 (m, 1), 2.2 (m, 1), 2.40-2.61 (m, 2), 3.40-3.90 (m,    11), 4.13 (s, 3), 5.22 (m, 1), 7.58 (dd, 1), 7.61 (s, 1), 7.75 (dd,    1), 8.09 (d, 1), 8.21 (d, 1), 9.00 (d, 1) ppm;-   2-[1-(4-(benzoxazol-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 2.01 (m, 1), 2.23 (m, 1), 2.41-2.62 (m, 2), 3.63-3.98    (m, 11), 4.13 (s, 3), 5.21 (m, 1), 7.04 (dd, 1), 7.18 (dd, 1), 7.25    (d, 1), 7.38 (d, 1), 7.57 (dd, 1), 7.62 (s, 1), 7.75 (dd, 1), 8.09    (d, 1), 8.11 (d, 1), 9.02 (d, 1) ppm;-   2-[1-(4-(benzthiazol-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 2.02 (m, 1), 2.30 (m, 1), 2.41-2.65 (m, 1), 3.60-3.95    (m, 11), 4.12 (s, 3), 5.31 (m, 1), 7.10 (dd, 1), 7.35 (dd, 1), 7.57    (m, 2), 7.61 (m, 1), 7.75 (dd, 1), 8.08 (d, 1), 8.21 (d, 1), 9.02    (d, 1) ppm;-   2-[1-(4-(pyrimidin-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 2.02 (m, 1), 2.25 (m, 1), 2.42-2.70 (m, 2), 3.63-4.08    (m, 8), 4.1 (s, 3), 5.40 (m, 1), 6.50 (m, 1), 7.55 (dd, 1), 7.62 (s,    1), 7.75 (dd, 1), 8.10 (d, 1), 8.19 (d, 1), 8.31 (d, 2), 9.21 (d, 1)    ppm;-   2-[1-(4-(aminocarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.85 (m, 1), 2.05 (m, 1), 2.35 (m, 2), 3.20-3.63 (m,    11), 4.13 (s, 3), 5.08 (m, 1), 6.08 (brs, 1), 7.61 (s, 1), 7.65 (dd,    1), 7.86 (dd, 1), 8.08 (d, 1), 8.20 (d, 1), 8.98 (d, 1) ppm;-   2-[1-(4-(benzoxazol-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.96 (m, 1), 2.13 (m, 1), 2.38 (m, 2), 3.58-3.85 (m,    8), 4.16 (s, 3), 5.18 (m, 1), 7.02 (dd, 1), 7.79 (dd, 1), 7.31 (d,    1), 7.41 (d, 1), 7.61 (s, 1), 7.65 (dd, 1), 8.85 (dd, 1), 8.12 (d,    1), 8.20 (d, 1), 8.99 (d, 1) ppm;-   2-[1-(4-(benzthiazol-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.96 (m, 1), 2.15 (m, 1), 2.38 (m, 2), 3.58-3.90 (m,    8), 4.16 (s, 3), 5.15 (m, 1), 7.05 (dd, 1), 7.28 (dd, 1), 7.46 (d,    1), 7.81 (s, 1), 7.65 (dd, 1), 7.78 (d, 1), 7.82 (dd, 1), 8.10 (d,    1), 8.19 (d, 1), 8.98 (d, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(ethoxycarbonyl)propoxy)quinoline;    NMR (DMSO-d₆) 1.14 (t, 3), 1.18 (t, 3), 2.14 (m, 2), 2.47 (q, 2),    3.30-3.55 (m, 8), 4.04 (q, 2), 4.25 (d, 2), 4.36 (q, 2), 7.56 (s,    1), 7.64 (t, 1), 7.83 (t, 1), 8.03 (d, 1), 8.19 (d, 1), 8.93 (m, 1)    ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-carboxypropoxy)quinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 2.11 (m, 2), 2.47 (q, 2), 3.30-3.55 (m,    8), 4.04 (q, 2), 4.25 (d, 2), 4.37 (q, 2), 7.56 (s, 1), 7.64 (t, 1),    7.83 (t, 1), 8.03 (d, 1), 8.20 (d, 1), 8.93 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(ethoxycarbonyl)prop-2-en-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.20 (t, 3), 3.30-3.55 (m, 8), 4.04 (q,    2), 4.15 (q, 2), 4.25 (d, 2), 5.20 (s, 1), 6.23 (d, 1), 7.14 (d, 1),    7.60 (s, 1), 7.68 (t, 1), 7.83 (t, 1), 8.03 (d, 1), 8.30 (d, 1),    8.93 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-((methoxycarbonyl)methyl)thioethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 3.0 (m, 1), 3.30 (m, 1), 3.30-3.45 (m, 2),    3.50-3.80 (m, 8), 3.75 (s, 3), 4.15 (m, 5), 5.45 (m, 1), 7.60 (t,    1), 7.65 (s, 1), 7.75 (t, 1), 8.10 (d, 1), 8.20 (d, 1), 9.0 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(carboxymethyl)thioethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 3.0 (m, 1), 3.30 (m, 1), 3.30-3.50 (m, 2),    3.50-3.80 (m, 8), 4.10 (m, 5), 5.45 (m, 1), 7.55 (m, 1), 7.65 (s,    1), 7.75 (t, 1), 8.10 (d, 1), 8.20 (d, 1), 9.0 (d, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(tetrahydro-2-oxofuran-3-yl)oxyquinoline;    NMR (CDCl₃) 1.28 (t, 3), 2.58 (m, 1), 3.00 (m, 1), 3.55 (m, 6), 3.70    (m, 2), 4.18 (q, 2), 4.37 (m, 2), 4.47 (m, 1), 4.60 (m, 1), 5.40 (t,    1), 7.60 (q, 1), 7.75 (s, 1), 7.80 (t, 1), 8.12 (d, 1), 8.26 (d, 1),    9.10 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-carboxy-3-hydroxypropoxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 2.20 (m, 2), 3.30-3.55 (m, 6), 3.68 (m,    2), 4.04 (q, 2), 4.25 (d, 2), 5.20 (t, 1), 7.40 (s, 1), 7.70 (t, 1),    7.85 (t, 1), 8.03 (d, 1), 8.24 (d, 1), 8.96 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1,1-di(ethoxycarbonyl)methoxy)quinoline;    NMR (CDCl₃) 1.28-1.40 (m, 9), 3.55 (m, 6), 3.70 (m, 2), 4.18 (q, 2),    4.38 (m, 6), 5.60 (s, 1), 7.57 (s, 1), 7.65 (t, 1), 7.80 (t, 1),    8.13 (d, 1), 8.42 (d, 1), 9.06 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1,1-di(carboxy)methoxy)quinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 3.20-3.60 (m, 8), 4.08 (q, 2), 4.30 (d,    6), 5.90 (s, 1), 7.54 (s, 1), 7.75 (t, 1), 7.90 (t, 1), 8.10 (d, 1),    8.30 (d, 1), 8.98 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.28 (t, 6), 1.8 (d, 3), 3.52 (m, 6), 3.70 (m, 2),    4.17-4.36 (m, 6), 5.16 (q, 1), 7.52 (s, 1), 7.60 (t, 1), 7.76 (t,    1), 8.10 (d, 1), 8.34 (d, 1), 9.06 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-carboxyethoxy)quinoline;    NMR (CDCl₃) 1.25 (t, 3), 1.83 (d, 3), 3.50 (m, 6), 3.65 (m, 2), 4.17    (q, 2), 4.35 (m, 2), 5.23 (q, 1), 7.58 (m, 2), 7.70 (t, 1), 8.02 (d,    1), 8.32 (d, 1), 9.16 (m, 1) ppm;-   2-[(3-(methoxycarbonyl)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.18 (t, 3), 2.22-2.42 (m, 2), 2.74 (m, 1), 2.96 (m, 1),    3.16 (d, 1), 3.68 (s, 3), 3.80, (m, 2), 4.08 (q, 2), 4.12 (s, 3),    4.34 (m, 6), 7.58 (t, 1), 7.62 (s, 1), 7.68 (t, 1), 8.08 (d, 1),    8.22 (d, 1), 8.96 (d, 1) ppm;-   2-[(3-(carboxy)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 2.22-2.42 (m, 2), 2.74 (m, 1), 2.96 (m,    1), 3.16 (d, 1), 3.80 (m, 2), 4.06 (q, 2), 4.12 (s, 3), 4.34 (m, 6),    7.60 (s, 1), 7.62 (t, 1), 7.84 (t, 1), 8.06 (d, 1), 8.19 (d, 1),    9.06 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-(methoxycarbonyl)pentyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 1.50 (m, 2), 1.70 (m, 2), 1.80 (m, 1), 1.90    (m, 1), 2.30 (m, 2), 3.40-3.80 (m, 8), 3.65 (s, 3), 4.15 (m, 5),    5.18 (m, 1), 7.60 (m, 1), 7.65 (s, 1), 7.75 (m, 1), 8.10 (d, 1),    8.20 (d, 1), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-(carboxy)pentyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 1.50 (m, 2), 1.65-1.95 (m, 4), 2.18 (m, 2),    3.40-3.80 (m, 8), 4.15 (m, 5), 5.20 (m, 1), 7.55 (m, 1), 7.65 (s,    1), 7.75 (m, 1), 8.05 (d, 1), 8.20 (d, 1), 9.0 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-hydroxyphenyl)methyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(carboxy)prop-1-en-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 3.25 (d, 2), 3.30-3.55 (m, 8), 4.02 (q,    2), 4.25 (d, 2), 5.20-5.40 (m, 1), 7.13 (d, 1), 7.64 (s, 1), 7.75    (t, 1), 7.90 (t, 1), 8.10 (d, 1), 8.30 (d, 1), 9.00 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-8-methoxy-4-hydroxyquinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.84-2.12 (m, 2), 2.37-2.48 (m, 2),    3.31-3.72 (m, 8), 4.04 (m, 5), 4.98 (m, 1), 7.25 (s, 1), 7.28 (d,    1), 7.42 (t, 1), 7.66 (d, 1) ppm;-   2-[(2-(methoxycarbonyl)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.26 (t, 3), 2.60-3.22 (m, 4), 3.38-4.22 (m, 1), 3.64    (s, 3), 3.76 (m, 2), 4.06 (m, 4), 4.18 (s, 3), 4.34 (m, 3), 7.62 (t,    1), 7.66 (s, 1), 7.94 (t, 1), 8.06 (d, 1), 8.18 (d, 1), 9.12 (m, 1)    ppm;-   2-[(2-(carboxy)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.16 (t, 3), 2.24 (dd, 1), 2.58 (m, 1), 2.62 (d, 1),    2.80 (m, 1), 3.16 (m, 2), 3.76 (d, 1), 4.06 (m, 4), 4.18 (s, 3),    4.34 (m, 6), 7.60 (s, 1), 7.62 (t, 1), 7.84 (t, 1), 8.06 (d, 1),    8.18 (d, 1), 8.98 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(tetrahydro-2-oxofuran-3-yl)oxyquinoline;    NMR (CDCl₃) 1.26 (t, 3), 2.00 (m, 1), 2.24 (m, 1), 2.40-2.60 (m, 3),    3.00 (m, 1), 3.40-3.80 (m, 11), 4.16 (q, 2), 4.44 (m, 1), 4.60 (m,    1), 5.25 (m, 1), 5.38 (q, 1), 7.60 (t, 1), 7.72 (s, 1), 7.78 (t, 1),    8.12 (d, 1), 8.24 (d, 1), 9.00 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(methoxycarbonyl)propoxy)quinoline;    NMR (CDCl₃) 1.20 (t, 3), 1.30 (t, 3), 2.20 (m, 2), 3.55 (m, 6), 3.70    (m, 2), 3.80 (s, 3), 4.20 (q, 2), 4.39 (d, 2), 5.04 (t, 1), 7.50 (s,    1), 7.60 (t, 1), 7.77 (t, 1), 8.10 (d, 1), 8.35 (d, 1), 9.06 (m, 1)    ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(carboxy)propoxy)quinoline;    NMR (DMSO-d₆) 1.10 (t, 3), 1.20 (t, 3), 2.10 (m, 2), 3.30-3.60 (m,    8), 4.06 (q, 2), 4.26 (d, 2), 5.20 (t, 1), 7.45 (s, 1), 7.70 (t, 1),    7.90 (t, 1), 8.08 (d, 1), 8.30 (d, 1), 8.96 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.20-1.30 (m, 6), 1.80 (s, 6), 3.55 (m, 6), 3.70 (m, 2),    4.16 (q, 2), 4.25 (q, 2), 4.34 (d, 2), 7.38 (s, 1), 7.57 (t, 1),    7.74 (t, 1), 8.08 (d, 1), 8.28 (d, 1), 9.02 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-hydroxy-1-carboxypropoxy)quinoline;    NMR (DMSO-d₆) 1.20 (m, 3), 1.86 (m, 1), 2.05 (m, 1), 2.20 (m, 2),    2.30 (m, 2), 3.30-3.60 (m, 6), 3.68 (m, 4), 4.06 (q, 2), 5.05 (m,    1), 5.22 (q, 1), 7.43 (s, 1), 7.70 (t, 1), 7.90 (t, 1), 8.10 (d, 1),    8.26 (d, 1), 8.95 (m, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-methyl-1-(carboxy)ethoxy)quinoline;    NMR (CDCl₃) 1.26 (t, 3), 1.90 (s, 6), 3.55 (m, 6), 3.70 (m, 2), 4.16    (q, 2), 4.42 (d, 2), 7.43 (s, 1), 7.55 (t, 1), 7.60 (t, 1), 7.90 (d,    1), 8.24 (d, 1), 9.03 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(methoxycarbonyl)methoxyquinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.90 (m, 1), 2.06 (m, 1), 2.38 (m, 2),    3.30-3.50 (m, 6), 3.52 (s, 3), 3.62 (m, 2), 3.72 (s, 3), 4.03 (q,    2), 5.03 (m, 1), 5.24 (s, 2), 7.50 (s, 1), 7.70 (t, 1), 7.87 (t, 1),    8.10 (d, 1), 8.23 (d, 1), 8.95 (m, 1) ppm;-   2-[1-(2-methyl-4-(benzyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.24-1.36 (m, 6), 1.43 (s, 9), 1.92-2.52 (m, 8),    2.67-3.14 (m, 4), 3.40-3.63 (m, 3), 4.13 (s, 3), 4.24-4.80 (m, 2),    5.18 (m, 1), 7.34 (m, 5), 7.57 (t, 1), 7.65 (s, 1), 7.73 (t, 1),    8.10 (d, 1), 8.23 (d, 1), 9.03 (m, 1) ppm;-   2-[1-(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.17-1.40 (m, 6), 2.00 (m, 1), 2.20 (m, 1), 2.40-2.60    (m, 2), 3.30-3.40 (m, 3), 3.70 (s, 3), 4.00-4.24 (m, 7), 4.40-4.80    (m, 2), 5.20 (m, 1), 7.57 (t, 1), 7.65 (s, 1), 7.75 (t, 1), 8.10 (d,    1), 8.23 (d, 1), 9.03 (m, 1) ppm;-   2-[1-(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.17-1.40 (m, 6), 2.00 (m, 1), 2.20 (m, 1), 2.45-2.64    (m, 2), 3.00-3.40 (m, 3), 4.00-4.24 (m, 8), 4.40-4.50 (m, 1), 5.25    (m, 1), 7.56 (t, 1), 7.65 (s, 1), 7.75 (t, 1), 8.10 (d, 1), 8.21 (d,    1), 9.20 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.28 (t, 3), 1.80 (d, 6), 2.00 (m, 1), 2.22 (m, 1), 2.51    (m, 2), 3.40-3.80 (m, 14), 4.17 (q, 2), 5.23 (m, 1), 7.35 (s, 1),    7.57 (t, 1), 7.75 (t, 1), 8.10 (d, 1), 8.26 (d, 1), 8.96 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-methyl-1-carboxyethoxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonylnaphthalene;    NMR (CDCl₃) 1.30 (t, 3), 1.90 (m, 1), 2.25 (m, 1), 2.50-2.70 (m, 2),    3.40-3.75 (m, 8), 4.18 (q, 2), 5.20 (m, 2), 5.30 (m, 1), 7.40 (m,    6), 7.55 (m, 2), 7.90 (m, 4), 8.35 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonylnaphthalene;    NMR (CDCl₃) 1.30 (t, 3), 1.80 (m, 1), 2.20 (m, 1), 2.50 (m, 2),    3.40-3.80 (m, 8), 4.10 (q, 2), 5.30 (m, 1), 7.50 (m, 2), 7.65 (m,    1), 7.80 (m, 4), 8.30 (s, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonylnaphthalene;    NMR (CDCl₃) 1.30 (t, 3), 3.40-3.80 (m, 8), 4.18 (q, 2), 4.35 (d, 2),    7.40-7.60 (m, 3), 7.92 (m, 3), 8.40 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-hydroxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 2.82 (m, 1), 3.36 (m, 5), 3.64 (m, 6),    3.06 (m, 2), 4.02 (s, 3), 4.12 (m, 2), 5.38 (m, 1), 6.80 (t, 1),    6.98 (d, 1), 7.18 (m, 3), 7.58 (t, 1), 7.62 (s, 1), 7.68 (t, 1),    8.16 (d, 1), 8.22 (d, 1), 8.32 (s, 1), 9.08 (d, 1) ppm;-   2-[(4-(2-hydroxy-3-chloropyridin-5-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(4-acetamidophenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-((2-methoxyethoxy)methyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2-methoxycarbonylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-aminoquinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.85 (m, 1), 2.05 (m, 1), 2.30 (m, 2),    3.25-3.65 (m, 8), 4.0 (q, 2), 5.05 (m, 1), 6.10 (m, 1), 6.80 (d, 1),    7.25 (d, 1), 7.50 (t, 1), 7.90 (d, 1), 8.70 (d, 1), 8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonylpropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.22-1.35 (m, 6), 1.48 (s, 9), 1.80 (d, 3), 1.97 (m, 1),    2.17 (m, 1), 2.40 (m, 2), 3.40-3.80 (m, 8), 4.18 (q, 2), 4.26 (m,    2), 5.10-5.30 (m, 2), 7.30 (d, 1), 7.60 (t, 1), 7.78 (t, 1), 8.10    (d, 1), 8.32 (d, 1), 8.96 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.28 (m, 6), 1.80 (d, 3), 1.97 (m, 1), 2.23 (m, 1), 2.57    (m, 2), 3.40-3.80 (m, 8), 4.17 (q, 2), 4.27 (m, 2), 5.07 (q, 2),    5.31 (m, 1), 7.50 (d, 1), 7.62 (t, 1), 7.78 (t, 1), 8.10 (d, 1),    8.34 (d, 1), 9.16 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.26 (m, 6), 1.78 (d, 3), 1.97 (m, 1), 2.23 (m, 1), 2.52    (m, 2), 3.40-3.80 (m, 11), 4.18 (q, 2), 4.24 (m, 2), 5.10-5.30 (m,    2), 7.50 (d, 1), 7.58 (t, 1), 7.76 (t, 1), 8.10 (d, 1), 8.35 (d, 1),    8.97 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)-2-methylpropoxy)quinoline;    NMR (CDCl₃) 1.17-1.34 (m, 9), 2.00 (m, 1), 2.23 (m, 1), 2.51 (m, 2),    3.40-3.80 (m, 11), 4.18 (q, 2), 4.25 (m, 2), 4.84 (m, 1), 5.23 (m,    1), 7.48 (d, 1), 7.60 (t, 1), 7.77 (t, 1), 8.10 (d, 1), 8.26 (d, 1),    8.98 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxy-2,2-dimethylpropoxy)quinoline;    NMR (CDCl₃) 1.17-1.30 (m, 9), 1.90 (m, 1), 2.16 (m, 1), 2.34-2.60    (m, 2), 3.40-3.80 (m, 8), 4.15 (q, 2), 4.87 (m, 1), 5.35 (m, 1),    7.50 (d, 1), 7.58 (t, 1), 7.71 (m, 1), 8.07 (m, 1), 8.26 (m, 1),    9.10 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(cyanomethoxy)quinoline;    NMR (CDCl₃) 1.27 (t, 3), 1.98 (m, 1), 2.23 (m, 1), 2.53 (m, 2),    3.40-3.80 (m, 11), 4.17 (q, 2), 5.10 (s, 2), 5.24 (m, 1), 7.66 (t,    1), 7.71 (s, 1), 7.80 (t, 1), 8.18 (d, 1), 8.21 (d, 1), 9.01 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.26 (t, 3), 1.43 (s, 9), 1.83 (d, 6), 1.97 (m, 1), 2.17    (m, 1), 2.40 (m, 2), 3.40-3.80 (m, 11), 4.18 (q, 2), 5.23 (m, 1),    7.35 (s, 1), 7.57 (t, 1), 7.75 (t, 1), 8.10 (d, 1), 8.26 (d, 1),    8.96 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.26 (t, 3), 1.82 (d, 6), 1.97 (m, 1), 2.21 (m, 1), 2.56    (m, 2), 3.40-3.80 (m, 11), 4.18 (q, 2), 5.33 (m, 1), 7.30 (s, 1),    7.60 (t, 1), 7.80 (t, 1), 8.14 (d, 1), 8.29 (d, 1), 9.19 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.22 (t, 3), 1.23 (t, 3), 1.90-2.23 (m, 4), 2.38 (m, 2),    2.64 (m, 2), 2.94 (m, 2), 3.40-3.80 (m, 8), 4.17 (q, 2), 4.22 (q,    2), 5.23 (m, 1), 7.28 (s, 1), 7.58 (t, 1), 7.76 (t, 1), 8.10 (d, 1),    8.32 (d, 1), 8.96 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.04 (t, 3), 1.18 (t, 3), 1.84 (m, 1), 1.95-2.01 (m,    3), 2.31 (m, 2), 2.62 (m, 2), 2.81 (m, 2), 3.30-3.66 (m, 8), 4.03    (q, 2), 4.14 (q, 2), 5.01 (m, 1), 6.99 (s, 1), 7.68 (t, 1), 7.86 (t,    1), 8.08 (d, 1), 8.28 (d, 1), 8.89 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxyethoxy)quinoline;    NMR (DMSO-d₆) 1.07 (t, 3), 1.867 (d, 3), 1.85 (m, 1), 2.04 (m, 1),    2.30 (m, 2), 3.30-3.70 (m, 8), 4.06 (q, 2), 5.03 (m, 1), 5.30 (m,    1), 7.42 (s, 1), 7.67 (t, 1), 7.86 (t, 1), 7.78 (t, 1), 8.08 (d, 1),    8.24 (d, 1), 8.96 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.19 (t, 3), 1.85 (m, 1), 2.04 (m, 3), 2.33 (m, 2),    2.60 (m, 2), 2.83 (m, 2), 3.30-3.70 (m, 8), 4.06 (q, 2), 5.03 (m,    1), 7.08 (s, 1), 7.70 (t, 1), 7.90 (t, 1), 8.10 (d, 1), 8.32 (d, 1),    9.15 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(dimethylaminocarbonyl)methoxyquinoline;    NMR (CDCl₃) 1.26 (t, 3), 1.98 (m, 1), 2.24 (m, 1), 2.53 (m, 2), 3.05    (s, 3), 3.13 (s, 3), 3.40-3.80 (m, 11), 4.17 (q, 2), 5.02 (q, 2),    5.24 (m, 1), 7.56 (s, 1), 7.59 (t, 1), 7.76 (t, 1), 8.12 (d, 1),    8.35 (d, 1), 9.01 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(dimethylaminocarbonyl)methoxyquinoline;    NMR (CDCl₃) 1.26 (t, 3), 1.98 (m, 1), 2.22 (m, 1), 2.53 (m, 2), 3.04    (s, 3), 3.13 (s, 3), 3.40-3.80 (m, 8), 4.17 (q, 2), 5.03 (s, 2),    5.33 (m, 1), 7.56 (s, 1), 7.59 (t, 1), 7.76 (t, 1), 8.08 (d, 1),    8.32 (d, 1), 9.11 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(oxiranyl)methoxyquinoline;    NMR (DMSO-d₆) 1.27 (t, 3), 1.98 (m, 1), 2.24 (m, 1), 2.40-2.60 (m,    2), 2.85 (m, 1), 3.00 (m, 1), 3.40-3.80 (m, 11), 4.16 (q, 2), 4.21    (m, 1), 4.62 (m, 1), 7.59 (t, 1), 7.63 (s, 1), 7.76 (t, 1), 8.10 (d,    1), 8.27 (d, 1), 9.02 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-hydroxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 2.62 (m, 1), 3.20 (m, 3), 3.36 (m, 2),    3.46 (m, 2), 3.64 (m, 1), 4.12 (s, 3), 3.06 (m, 2), 5.38 (m, 1),    6.78 (dd, 1), 6.82 (d, 1), 6.92 (s, 1), 7.18 (t, 1), 7.52 (t, 1),    7.62 (s, 1), 7.68 (t, 1), 8.16 (d, 1), 8.20 (d, 1), 8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-5-nitroquinoline;    NMR (CDCl₃) 1.30 (m, 3), 2.0 (m, 1), 2.25 (m, 1), 2.55 (m, 2),    3.40-3.80 (m, 8), 4.15 (m, 2), 5.15 (m, 2), 5.30 (m, 1), 7.30 (m,    5), 7.85 (m, 1), 8.45 (m, 3), 8.90 (m, 1), 9.15 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-methoxycarbonylpropyl]aminocarbonyl-5-nitroquinoline;    NMR (CDCl₃) 1.30 (t, 3), 1.95 (m, 1), 2.25 (m, 1), 2.45 (m, 2),    3.40-3.80 (m, 8), 4.20 (q, 2), 5.40 (m, 1), 7.90 (m, 1), 8.40-8.50    (m, 3), 9.00 (m, 1), 9.20 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((ethoxycarbonyl)methoxycarbonyl)propyl]aminocarbonyl-5-aminoquinoline;    NMR (CDCl₃) 1.30 (t, 6), 2.10 (m, 1), 2.30 (m, 1), 2.65 (m, 2),    3.40-3.80 (m, 8), 4.20 (m, 4), 4.60 (m, 2), 5.30 (m, 1), 6.90 (d,    1), 7.55 (m, 1), 7.65 (m, 1), 8.20 (d, 1), 8.30 (d, 1), 9.0 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(2,2,2-trifluoroethoxy)quinoline;    NMR (CDCl₃) 1.27 (t, 3), 2.00 (m, 1), 2.24 (m, 1), 2.51 (m, 2),    3.40-3.78 (m, 11), 4.16 (q, 2), 4.64 (m, 2), 5.26 (m, 1), 7.60-7.78    (m, 2), 7.85 (t, 1), 8.15-8.35 (m, 2), 9.01 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(oxiranyl)methoxyquinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.85 (m, 1), 2.03 (m, 1), 2.33 (m, 2),    3.30-3.57 (m, 6), 3.64 (m, 2), 4.04 (q, 2), 4.37 (m, 1), 4.58 (m,    1), 5.07 (m, 1), 7.63 (s, 1), 7.72 (t, 1), 7.86 (t, 1), 8.10 (d, 1),    8.32 (d, 1), 9.02 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methylsulfonyl)propyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(1,2,4-triazol-3-yl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 3.15 (m, 1), 3.23-3.40 (m, 8), 4.01 (q,    2), 4.10 (s, 3), 5.38 (m, 1), 7.55 (s, 1), 7.63 (dd, 1), 7.81 (dd,    1), 8.05 (d, 1), 8.18 (d, 1), 8.36 (br s, 1), 9.15 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(carboxy)methoxyquinoline;    NMR (CDCl₃) 1.26 (t, 3), 1.97 (m, 1), 2.18 (m, 1), 2.48 (m, 2),    3.40-3.80 (m, 11), 4.16 (q, 2), 5.07 (q, 2), 5.24 (m, 1), 7.61 (t,    1), 7.65 (s, 1), 7.78 (t, 1), 8.09 (d, 1), 8.26 (d, 1), 9.05 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(ethoxycarbonylmethylaminocarbonyl)methoxyquinoline;    NMR (CDCl₃) 1.28 (m, 6), 1.97 (m, 1), 2.24 (m, 1), 2.43-2.58 (m, 2),    3.43-3.78 (m, 11), 4.16 (m, 4), 4.28 (q, 2), 4.86 (s, 2), 5.27 (m,    1), 7.13 (m, 1), 7.65 (m, 2), 7.80 (t, 1), 8.17 (d, 1), 8.27 (d, 1),    8.98 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3,3,3-trifluoropropoxy)quinoline;    NMR (CDCl₃) 1.27 (t, 3), 1.97 (m, 1), 2.23 (m, 1), 2.51 (m, 2), 2.79    (m, 2), 3.41-3.80 (m, 11), 4.17 (q, 2), 4.57 (t, 2), 5.26 (m, 1),    7.58 (t, 1), 7.63 (s, 1), 7.77 (t, 1), 8.12 (d, 1), 8.22 (d, 1),    9.02 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3,3,3-trifluoropropoxy)quinoline;    NMR (CDCl₃) 1.27 (t, 3), 1.99 (m, 1), 2.23 (m, 1), 2.54 (m, 2), 2.79    (m, 2), 3.41-3.80 (m, 8), 4.18 (q, 2), 4.56 (t, 2), 5.26 (m, 1),    7.58 (t, 1), 7.64 (s, 1), 7.77 (t, 1), 8.13 (d, 1), 8.21 (d, 1),    9.013 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-cyanoethoxy)quinoline;    NMR (CDCl₃) 1.27 (t, 3), 1.98 (d, 3), 2.00 (m, 1), 2.24 (m, 1), 2.54    (m, 2), 3.40-3.80 (m, 11), 4.17 (q, 2), 5.20-5.40 (m, 2), 7.64 (t,    1), 7.80 (m, 2), 8.18 (m, 2), 8.98 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(benzylaminocarbonyl)methoxyquinoline;    NMR (CDCl₃) 1.27 (t, 3), 1.98 (m, 1), 2.23 (m, 1), 2.53 (m, 2),    3.40-3.80 (m, 11), 4.16 (q, 2), 4.61 (d, 2), 4.88 (s, 2), 5.26 (m,    1), 7.78 (t, 1), 7.28-7.40 (m, 5), 7.61 (t, 1), 7.65 (s, 1), 7.77    (t, 1), 8.14 (d, 1), 8.16 (d, 1), 9.01 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-tetrazol-5-ylethoxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.85 (m, 3), 2.03 (m, 1), 2.31 (m, 2),    3.30-3.70 (m, 8), 4.05 (q, 2), 5.03 (m, 1), 6.47 (m, 1), 7.71 (m,    2), 7.84 (t, 1), 8.08 (d, 1), 8.27 (d, 1), 8.92 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(benzylaminocarbonyl)methoxyquinoline;    NMR (DMSO-d₆) 1.19 (t, 3), 1.90 (m, 1), 2.07 (m, 1), 2.37 (m, 2),    3.30-3.73 (m, 8), 4.04 (q, 2), 4.39 (d, 2), 5.01 (s, 2), 5.08 (m,    1), 7.20-7.38 (m, 5), 7.58 (s, 1), 7.71 (t, 1), 7.88 (t, 1), 8.10    (d, 1), 8.43 (d, 1), 8.86 (m, 1), 8.97 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-((carboxy)methylamino)carbonylmethoxyquinoline;    NMR (CDCl₃) 1.24 (t, 3), 1.91 (m, 1), 2.16 (m, 1), 2.43-2.58 (m, 2),    3.41-3.78 (m, 8), 4.12 (m, 4), 4.77 (s, 2), 5.27 (m, 1), 7.45 (m,    1), 7.55 (m, 1), 7.64 (t, 1), 7.94 (d, 1), 8.04 (d, 1), 9.04 (d, 1)    ppm;-   2-[1-(3-(2-methylpropyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(1-methylethyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-benzyl-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(3-(4-hydroxybenzyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.47 (s, 9), 2.01 (m, 1), 2.24 (m, 1), 2.34 (s, 3), 2.42    (m, 2), 3.14-3.34 (m, 4), 3.74-3.93 (m, 4), 4.13 (s, 3), 5.31 (m,    1), 6.75 (m, 3), 7.16 (t, 1), 7.57 (t, 1), 7.66 (s, 1), 7.74 (t, 1),    8.10 (d, 1), 8.23 (d, 1), 9.03 (d, 1) ppm;-   2-[1-(4-(pyridin-2-yl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.44 (s, 9), 1.98 (m, 1), 2.23 (m, 1), 2.43 (m, 2),    3.51-3.90 (m, 8), 4.13 (s, 3), 5.30 (m, 1), 6.66 (m, 2), 7.57 (m,    2), 7.65 (s, 1), 7.75 (t, 1), 8.10 (d, 1), 8.23 (m, 2), 9.04 (d, 1)    ppm;-   2-[1-(4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.89 (m, 1), 2.08 (m, 1), 2.24 (s, 3), 2.32 (m, 2),    3.10-3.26 (m, 4), 3.65 (m, 2), 3.79 (m, 2), 4.13 (s, 3), 5.07 (m,    1), 6.64 (d, 1), 6.80 (m, 2), 7.12 (t, 1), 7.61 (s, 1), 7.66 (t, 1),    7.85 (t, 1), 8.10 (d, 1), 8.18 (d, 1), 8.97 (d, 1) ppm;-   2-[1-(4-(pyridin-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.88 (m, 1), 2.08 (m, 1), 2.34 (m, 2), 3.51-3.72 (m,    6), 3.78 (m, 2), 4.13 (s, 3), 5.16 (m, 1), 6.66 (m, 1), 6.85 (d, 1),    7.56 (t, 1), 7.61 (s, 1), 7.67 (t, 1), 7.85 (t, 1), 8.08-8.21 (m,    3), 8.97 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3,4,4-trifluorobut-3-en-1-oxy)quinoline;    NMR (CDCl₃) 1.26 (t, 3), 1.98 (m, 1), 2.24 (m, 1), 2.52 (m, 2), 2.92    (m, 2), 2.97 (m, 2), 3.41-3.78 (m, 11), 4.16 (q, 2), 4.45 (t, 2),    5.24 (m, 1), 7.58 (t, 1), 7.63 (s, 1), 7.74 (t, 1), 8.10 (d, 1),    8.17 (d, 1), 9.01 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3,4,4-trifluorobut-3-en-1-oxy)quinoline;    NMR (CDCl₃) 1.25 (t, 3), 1.98 (m, 1), 2.24 (m, 1), 2.56 (m, 2), 2.92    (m, 2), 2.97 (m, 2), 3.41-3.78 (m, 8), 4.16 (q, 2), 4.44 (t, 2),    5.31 (m, 1), 7.58 (t, 1), 7.63 (s, 1), 7.74 (t, 1), 8.10 (d, 1),    8.17 (d, 1), 9.17 (d, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.22 (t, 3), 1.31 (t, 3), 2.13 (m, 2), 2.63 (m, 2), 2.94    (m, 2), 3.57 (m, 6), 3.68 (m, 2), 4.17 (q, 2), 4.24 (q, 2), 4.35 (d,    2), 7.16 (s, 1), 7.60 (t, 1), 7.76 (t, 1), 8.10 (d, 1), 8.34 (d, 1),    9.03 (t, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(carboxy)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.22 (t, 3), 2.03 (m, 2), 2.59 (m, 2), 2.82 (m, 2),    3.30-3.60 (m, 8), 4.04 (q, 2), 4.23 (d, 2), 7.08 (s, 1), 7.71 (t,    1), 7.90 (t, 1), 8.07 (d, 1), 8.28 (d, 1), 8.94 (t, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(tetrazol-5-yl)methoxyquinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.86 (m, 1), 2.08 (m, 1), 2.26 (m, 2),-   3.44 (m, 6), 3.64 (m, 2), 4.04 (q, 2), 5.06 (m, 1), 5.88 (s, 1),    7.70 (t, 3), 7.78 (s, 1), 7.84 (t, 1), 8.10 (d, 1), 8.26 (d, 1),    8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(2-hydroxyethoxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.84 (m, 1), 2.14 (m, 1), 2.14 (m, 2),    3.40 (m, 6), 3.64 (m, 2), 3.86 (m, 2), 4.04 (q, 2), 4.36 (m, 2),    5.08 (m, 1), 7.58 (s, 1), 7.68 (t, 3), 7.84 (t, 1), 8.08 (d, 1),    8.18 (d, 1), 8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-(carboxymethyl)aminoquinoline;    NMR (DMSO-d₆) 1.10 (t, 3), 1.80 (m, 1), 2.0 (m, 1), 2.25 (m, 2),    3.20-3.60 (m, 8), 4.0 (m, 4), 5.0 (m, 1), 6.40 (d, 1), 7.30 (d, 1),    7.50 (m, 1), 7.95 (d, 1), 8.70 (d, 1), 8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(methoxycarbonyl)ethoxy)quinoline;    NMR (CDCl₃) 1.27 (t, 3), 1.77 (d, 3), 1.98 (m, 1), 2.23 (m, 1), 2.48    (m, 2), 3.40-3.80 (m, 14), 4.16 (q, 2), 5.14-5.30 (m, 2), 7.48 (s,    1), 7.60 (t, 1), 7.76 (t, 1), 8.10 (d, 1), 8.32 (d, 1), 8.98 (t, 1)    ppm and NMR (CDCl₃) 1.27 (t, 3), 1.78 (d, 3), 1.98 (m, 1), 2.23 (m,    1), 2.48 (m, 2), 3.40-3.80 (m, 14), 4.16 (q, 2), 5.14-5.30 (m, 2),    7.48 (s, 1), 7.60 (t, 1), 7.76 (t, 1), 8.10 (d, 1), 8.32 (d, 1),    8.98 (t, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(carboxy)ethoxy)quinoline;    NMR (DMSO) 1.24 (t, 3), 1.71 (d, 3), 1.85 (m, 1), 2.03 (m, 1), 2.32    (m, 2), 3.30-3.71 (m, 8), 4.06 (q, 2), 5.06 (m, 1), 5.34 (m, 1),    7.46 (s, 1), 7.71 (t, 1), 7.89 (t, 1), 8.10 (d, 1), 8.27 (d, 1),    8.98 (m, 1) ppm and NMR (DMSO) 1.18 (t, 3), 1.71 (d, 3), 1.86 (m,    1), 2.03 (m, 1), 2.32 (m, 2), 3.30-3.73 (m, 8), 4.06 (q, 2), 5.06    (m, 1), 5.34 (m, 1), 7.46 (s, 1), 7.71 (t, 1), 7.89 (t, 1), 8.10 (d,    1), 8.27 (d, 1), 8.98 (m, 1) ppm;-   2-[1-(3-(1-methylethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 0.76-0.98 (m, 6), 1.26 (m, 3), 1.38-1.70 (m, 12), 1.96    (m, 1), 2.24 (m, 1), 2.32-2.50 (m, 2), 2.71-3.47 (m, 3), 4.01-4.31    (m, 7), 4.32-4.60 (m, 2), 5.15-5.33 (m, 1), 7.56 (t, 1), 7.64 (s,    1), 7.75 (t, 1), 8.10 (d, 1), 8.24 (d, 1), 9.03 (m, 1) ppm and NMR    (CDCl₃) 0.77-0.98 (m, 6), 1.26 (m, 3), 1.38-1.70 (m, 12), 1.96 (m,    1), 2.24 (m, 1), 2.32-2.50 (m, 2), 2.71-3.45 (m, 3), 4.01-4.27 (m,    7), 4.32-4.60 (m, 2), 5.15-5.33 (m, 1), 7.56 (t, 1), 7.64 (s, 1),    7.75 (t, 1), 8.10 (d, 1), 8.24 (d, 1), 9.03 (m, 1) ppm;-   2-[1-(3-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO) 0.73-0.98 (m, 6), 1.15-1.57 (m, 6), 1.78-2.20 (m, 2),    2.34 (m, 2), 2.65-3.44 (m, 3), 3.80-4.38 (m, 9), 5.01-5.18 (m, 1),    7.61 (s, 1), 7.66 (t, 1), 7.87 (t, 1), 8.10 (d, 1), 8.22 (d, 1),    8.96 (m, 1) ppm and NMR (DMSO) 0.73-0.98 (m, 6), 1.16-1.60 (m, 6),    1.82-2.17 (m, 2), 2.34 (m, 2), 2.67-3.42 (m, 3), 3.80-4.36 (m, 9),    5.01-5.18 (m, 1), 7.61 (s, 1), 7.66 (t, 1), 7.87 (t, 1), 8.10 (d,    1), 8.22 (d, 1), 8.96 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 1.45 (s, 9), 2.0 (m, 1), 2.20 (m, 1), 2.40    (m, 2), 3.40-3.80 (m, 8), 4.10 (s, 3), 4.20 (q, 2), 5.20 (m, 1),    7.50 (d, 1), 7.65 (s, 1), 8.15 (m, 2), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 2.0 (m, 1), 2.20 (m, 1), 2.60 (m, 2),    3.40-3.90 (m, 8), 4.20 (m, 5), 5.35 (m, 1), 7.60 (m, 1), 7.70 (m,    1), 8.20 (m, 2), 9.20 (m, 1) ppm;-   2-[1-(2-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 0.88-1.10 (m, 6), 1.26 (m, 3), 1.38-1.62 (m, 12), 1.96    (m, 1), 2.21 (m, 1), 2.32-2.50 (m, 2), 2.61-3.42 (m, 3), 3.92-4.80    (m, 9), 5.15-5.30 (m, 1), 7.57 (t, 1), 7.65 (s, 1), 7.75 (t, 1),    8.10 (d, 1), 8.24 (d, 1), 8.92 (m, 1) ppm;-   2-[1-(2-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 0.88-1.10 (m, 6), 1.27 (m, 3), 1.35-1.60 (m, 3),    1.80-2.24 (m, 2), 2.48-2.65 (m, 2), 2.84-3.11 (m, 2), 3.37 (m, 1),    3.94-4.80 (m, 9), 5.25 (m, 1), 7.59 (t, 1), 7.64 (s, 1), 7.80 (t,    1), 8.14 (d, 1), 8.23 (d, 1), 9.16 (m, 1) ppm and NMR (CDCl₃)    0.88-1.08 (m, 6), 1.25 (m, 3), 1.35-1.62 (m, 3), 1.78-2.26 (m, 2),    2.41-2.62 (m, 2), 2.80-3.42 (m, 3), 3.92-4.85 (m, 9), 5.18-5.33 (m,    1), 7.56 (t, 1), 7.63 (s, 1), 7.74 (t, 1), 8.10 (d, 1), 8.21 (d, 1),    9.12 (m, 1) ppm;-   2-[1-(3-(1-methylethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.67-1.23 (m, 9), 1.73-2.11 (m, 3), 2.32 (m, 2),    2.74-2.98 (m, 2), 3.10-3.37 (m, 2), 3.72 (m, 1), 3.80-4.53 (m, 8),    5.07 (m, 1), 7.58 (s, 1), 7.64 (t, 1), 7.83 (t, 1), 8.07 (d, 1),    8.18 (d, 1), 8.88 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.19 (t, 3), 1.28 (t, 3), 1.95-2.25 (m, 4), 2.40-2.70    (m, 4), 2.96 (m, 2), 3.40-3.80 (m, 11), 4.17 (q, 2), 4.23 (q, 2),    5.24 (m, 1), 7.14 (s, 1), 7.60 (t, 1), 7.87 (t, 1), 8.10 (d, 1),    8.32 (d, 1), 8.94 (d, 1) ppm;-   2-[1-(4-(3-chlorophenyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.35 (s, 9), 1.84 (m, 1), 2.03 (m, 1), 2.31 (m, 2),    3.12-3.34 (m, 4), 3.63 (m, 2), 3.75 (m, 2), 4.12 (s, 3), 5.07 (m,    1), 6.78 (d, 1), 6.92 (d, 1), 6.96 (s, 1), 7.21 (t, 1), 7.57 (s, 1),    7.65 (t, 1), 7.84 (t, 1), 8.07 (d, 1), 8.17 (d, 1), 8.92 (d, 1) ppm;-   2-[1-(4-(3-methylphenyl)-3-methylpiperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 0.95-1.13 (m, 3), 1.47 (s, 9), 2.02 (m, 1), 2.21-2.57    (m, 5), 3.08-4.45 (m, 10), 5.27 (m, 1), 6.74 (m, 3), 7.16 (m, 1),    7.57 (m, 1), 7.65 (s, 1), 7.75 (t, 1), 8.12 (d, 1), 8.22 (d, 1),    9.04 (m, 1) ppm;-   2-[1-(4-(3-chlorophenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 2.02 (m, 1), 2.24 (m, 1), 2.57 (m, 2), 3.18-3.32 (m, 4),    3.77-3.91 (m, 4), 4.15 (s, 3), 5.33 (m, 1), 6.79 (d, 1), 7.87 (m,    2), 7.18 (t, 1), 7.57 (t, 1), 7.66 (s, 1), 7.77 (t, 1), 8.12 (d, 1),    8.24 (d, 1), 9.25 (d, 1) ppm;-   2-[1-(piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(piperidin-4-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-di(acetyl)aminoquinoline;    NMR (CDCl₃) 1.30 (t, 3), 2.0 (m, 1), 2.30 (m, 1), 2.35 (s, 3), 2.40    (s, 3), 2.60 (m, 2), 3.40-3.85 (m, 8), 4.20 (q, 2), 5.35 (m, 1),    7.50 (d, 1), 7.85 (m, 1), 8.15 (d, 1), 8.35 (m, 1), 8.65 (m, 2),    9.15 (m, 1) ppm;-   2-[1-(3-methyl-4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.82-0.91 (m, 3), 1.78 (m, 1), 2.02 (m, 1), 2.18-2.56    (m, 5), 3.07-3.35 (m, 1), 3.40-3.95 (m, 4), 4.02-4.41 (m, 5), 5.03    (m, 1), 7.08 (m, 1), 7.26 (m, 3), 7.57 (m, 2), 7.76 (m, 1),    8.01-8.13 (m, 2), 9.18 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-acetamidoquinoline;    NMR (CDCl₃) 1.30 (m, 3), 2.0 (m, 1), 2.20 (m, 1), 2.40 (s, 3), 2.60    (m, 2), 3.40-3.85 (m, 8), 4.20 (m, 2), 5.35 (m, 1), 7.60-7.80 (m,    3), 8.40 (m, 1), 9.0 (m, 2) ppm;-   2-[1-(3-(1-hydroxyethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.27-1.38 (m, 6), 1.46 (s, 9), 1.94 (m, 1), 2.17 (m, 1),    2.44 (m, 2), 2.92 (m, 1), 3.27-3.60 (m, 2), 3.90-4.63 (m, 9), 5.26    (m, 1), 7.56 (t, 1), 7.63 (s, 1), 7.73 (t, 1), 8.09 (d, 1), 8.22 (d,    1), 8.93 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-4-(1-tetrazol-5-ylethoxy)quinoline;    NMR (DMSO-d₆) 1.07-1.18 (m, 6), 1.87 (m, 4), 2.05 (m, 1), 2.37 (m,    2), 3.32-3.68 (m, 8), 3.95-4.06 (m, 4), 5.03 (m, 1), 6.47 (m, 1),    7.67 (m, 2), 7.85 (t, 1), 8.07 (d, 1), 8.27 (d, 1), 8.93 (d, 1) ppm;-   2-[1-(3-(1-hydroxyethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.18 (m, 6), 1.78 (m, 1), 2.01 (m, 1), 2.32 (m, 2),    2.77 (m, 1), 3.27-3.43 (m, 2), 3.80-4.41 (m, 9), 5.06 (m, 1), 7.56    (m, 1), 7.63 (t, 1), 7.83 (t, 1), 8.08 (m, 1), 8.18 (m, 1), 8.93    (m, 1) ppm and NMR (DMSO-d₆) 1.05-1.23 (m, 6), 1.82 (m, 1), 2.01 (m,    1), 2.30 (m, 2), 2.84 (m, 1), 3.03-3.23 (m, 2), 3.40-4.41 (m, 9),    5.04 (m, 1), 7.56 (s, 1), 7.63 (t, 1), 7.83 (t, 1), 8.08 (d, 1),    8.18 (d, 1), 8.93 (m, 1) ppm;-   2-[1-(4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(carboxy)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.84 (m, 1), 2.03 (m, 3), 2.25 (s, 3), 2.35 (m, 2),    2.58 (m, 2), 2.83 (m, 2), 3.10-3.24 (m, 4), 3.62-3.85 (m, 4), 5.11    (m, 1), 6.64 (d, 1), 6.77 (m, 2), 7.08 (s, 1), 7.12 (d, 1), 7.71 (t,    1), 7.88 (t, 1), 8.11 (d, 1), 8.27 (d, 1), 8.92 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.23 (t, 3), 1.27 (t, 3), 1.46 (s, 9), 1.96 (m, 1), 2.16    (m, 3), 2.37 (m, 2), 2.94 (m, 2), 3.41-3.79 (m, 8), 4.17 (q, 2),    4.24 (q, 2), 5.19 (m, 1), 7.13 (s, 1), 7.54 (d, 1), 8.13 (s, 1),    8.25 (d, 1), 8.87 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.05 (t, 3), 1.18 (t, 3), 1.82 (m, 1), 2.00 (m, 3),    2.30 (m, 2), 2.60 (m, 2), 2.79 (m, 2), 3.35-3.65 (m, 8), 4.05 (q,    2), 4.16 (q, 2), 5.00 (m, 1), 6.99 (s, 1), 7.72 (d, 1), 8.15 (s, 1),    8.30 (d, 1), 8.88 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.18 (t, 3), 1.25 (m, 6), 1.97 (m, 1), 2.09 (m, 1), 2.21    (m, 2), 2.48 (m, 2), 2.62 (m, 2), 2.94 (m, 2), 3.42-3.78 (m, 8),    4.12-4.26 (m, 6), 5.23 (m, 1), 7.13 (s, 1), 7.60 (t, 1), 7.75 (t,    1), 8.07 (d, 1), 8.33 (d, 1), 8.92 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.85 (m, 1), 1.98 (m, 3), 2.30 (m, 2),    2.58 (m, 2), 2.78 (m, 2), 3.35-3.62 (m, 8), 4.05 (q, 2), 4.96 (m,    1), 7.03 (s, 1), 7.70 (d, 1), 8.15 (s, 1), 8.25 (d, 1), 8.88 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-methoxyquinoline;    NMR (CDCl₃) 1.30 (t, 3), 2.0 (m, 1), 2.20 (m, 1), 2.60 (m, 2),    3.40-3.85 (m, 8), 4.10 (s, 3), 4.20 (q, 2), 5.30 (m, 1), 7.60 (m,    2), 8.0 (s, 1), 9.10 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxy-3-(diethylamino)propoxy)quinoline;    NMR (DMSO-d₆) 1.18 (m, 9), 1.83 (m, 1), 2.02 (m, 1), 2.31 (m, 2),    2.48 (m, 2), 3.22-3.68 (m, 14), 4.04 (q, 2), 5.03 (m, 1), 5.46 (m,    1), 7.47 (s, 1), 7.71 (t, 1), 7.88 (t, 1), 8.10 (d, 1), 8.31 (d, 1),    8.94 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.15 (t, 3), 1.90 (m, 1), 2.10 (m, 3), 2.40 (m, 2), 2.60    (m, 2), 2.80 (m, 2), 3.40-3.70 (m, 8), 4.05 (q, 2), 5.10 (m, 1), 7.0    (s, 1), 7.60 (s, 1), 8.0 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.80-1.95 (m, 1), 2.00 (m, 2), 2.30 (m,    2), 2.60 (m, 2), 2.80 (m, 2), 3.30-3.75 (m, 8), 4.05 (q, 2), 5.00    (m, 1), 7.15 (s, 1), 7.85 (d, 1), 8.10 (d, 1), 8.25 (s, 1), 8.85    (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.10 (t, 3), 1.98 (m, 2), 2.30-2.63 (m, 3), 2.75-2.87    (m, 3), 3.28-3.50 (m, 8), 3.94 (q, 2), 5.17 (m, 1), 7.64 (t, 1),    7.80 (t, 1), 8.01 (d, 1), 8.22 (d, 1), 9.10 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1,1-di(ethoxycarbonyl)methoxy)quinoline;    NMR (CDCl₃) 1.04-1.18 (m, 9), 1.96 (m, 1), 2.23 (m, 1), 2.53 (m, 2),    3.40-3.80 (m, 8), 4.15 (q, 2), 4.37 (m, 4), 5.24 (m, 1), 5.57 (s,    1), 7.53 (s, 1), 7.63 (t, 1), 7.78 (t, 1), 8.11 (d, 1), 8.41 (d, 1),    8.98 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1,1-di(carboxy)methoxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.84 (m, 1), 2.00 (m, 1), 2.30 (m, 2),    3.35-3.65 (m, 8), 4.01 (q, 2), 5.02 (m, 1), 5.88 (s, 1), 7.47 (s 1),    7.70 (t, 1), 7.90 (t, 1), 8.10 (d, 1), 8.27 (d, 1), 8.94 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.14 (t, 3), 1.83 (m, 1), 2.02 (m, 3), 2.28 (m, 2),    2.54 (s, 3), 2.56 (m, 2), 2.78 (m, 2), 3.40 (m, 6), 3.62 (m, 2),    4.03 (q, 2), 5.00 (m, 1), 7.02 (s, 1), 7.68 (dd, 1), 7.95 (d, 1),    8.14 (s, 1), 8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-nitro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.88 (m, 1), 2.06 (m, 3), 2.30 (m, 2),    2.69 (m, 2), 2.83 (m, 2), 3.30-3.65 (m, 8), 4.05 (q, 2), 5.02 (m,    1), 7.19 (s, 1), 8.32 (d, 1), 8.59 (d, 1), 8.64 (s, 1), 9.02 (d, 1),    9.06 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-amino-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.84 (m, 1), 2.01 (m, 3), 2.30 (m, 2),    2.65 (m, 2), 2.78 (m, 2), 3.30-3.65 (m, 8), 4.05 (q, 2), 5.00 (m,    1), 6.92 (s, 1), 7.19 (m, 2), 7.92 (d, 1), 8.79 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.30 (m, 2),    2.55 (m, 2), 2.77 (m, 2), 2.88 (s, 3), 3.40 (m, 6), 3.62 (m, 2),    4.03 (q, 2), 4.98 (m, 1), 6.93 (s, 1), 7.42 (d, 1), 7.65 (t, 1),    7.86 (d, 1), 8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-(benzyloxy)-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.22 (t, 3), 1.28 (t, 3), 1.46 (s, 9), 1.95 (m, 1),    1.99-2.24 (m, 3), 2.38 (m, 2), 2.62 (m, 2), 2.94 (m, 2), 3.41-3.80    (m, 8), 4.20 (m, 4), 5.22 (m, 1), 5.25 (s, 2), 7.06 (s, 1),    7.18-7.58 (m, 7), 8.13 (d, 1), 8.92 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-hydroxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.22 (t, 3), 1.28 (t, 3), 1.46 (s, 9), 1.77 (m, 1),    1.95-2.24 (m, 3), 2.42 (m, 2), 2.59 (m, 2), 2.94 (m, 2), 3.46-3.83    (m, 8), 4.21 (m, 4), 5.22 (m, 1), 6.95 (s, 1), 7.07 (d, 1), 7.34 (s,    1), 8.04 (d, 1), 8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(benzyloxy)-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.85 (m, 1), 1.94-2.17 (m, 3), 2.32 (m,    2), 2.57 (m, 2), 2.81 (m, 2), 3.31-3.72 (m, 8), 4.05 (q, 4), 5.05    (m, 1), 5.26 (s, 2), 6.96 (s, 1), 7.35-7.61 (m, 7), 8.19 (d, 1),    8.88 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.85 (m, 1), 2.02 (m, 3), 2.30 (m, 2),    2.55 (m, 2), 2.80 (m, 2), 3.35-3.65 (m, 8), 4.05 (q, 2), 5.00 (m,    1), 6.90 (s, 1), 7.20 (d, 1), 7.30 (s, 1), 8.10 (d, 1), 8.85 (d, 1),    10.40 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-n-propoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.03 (t, 3), 1.18 (t, 3), 1.82 (m, 3), 2.03 (m, 3),    2.31 (m, 2), 2.57 (m, 2), 2.77 (m, 2), 3.34-3.68 (m, 8), 4.06 (q,    2), 2.13 (q, 2), 5.03 (m, 1), 6.84 (s, 1), 7.33 (d, 1), 7.43 (d, 1),    8.14 (d, 1), 8.87 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(carboxy)methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.30 (m, 2),    2.60 (m, 2), 2.80 (m, 2), 3.30-3.62 (m, 8), 4.05 (q, 2), 4.94 (s,    2), 5.02 (m, 1), 6.93 (s, 1), 7.40 (m, 2), 8.20 (d, 1), 8.90 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxybutyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.05 (d, 3), 1.19 (t, 3), 1.65 (m 1), 2.0 (m, 3),    2.40-2.60 (m, 2), 2.80 (m, 2), 3.30-3.75 (m, 8), 4.05 (q, 2), 4.99    (m, 1), 7.02 (s, 1), 7.70 (t, 1), 7.85 (t, 3), 8.10 (d, 1), 8.25 (d,    1), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(diethylamino)ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18-1.33 (m, 9), 1.82 (m, 1), 2.03 (m, 3), 2.31 (m,    2), 2.57 (m, 2), 2.80 (m, 2), 3.24-3.71 (m, 14), 4.06 (q, 2), 4.57    (m, 2), 5.07 (m, 1), 6.97 (s, 1), 7.37 (d, 1), 7.56 (s, 1), 8.23 (d,    1), 8.86 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.30 (m, 2),    2.56 (m, 2), 2.79 (m, 2), 3.35-3.65 (m, 8), 3.92 (s, 3), 4.02 (q,    2), 5.00 (m, 1), 6.95 (s, 1), 7.30 (d, 1), 7.42 (s, 1), 8.15 (d, 1),    8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(2-carboxy-4-hydroxypyrrolidin-1-yl)ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.19 (t, 3), 1.82-2.18 (m, 6), 2.31 (m, 2), 2.57 (m,    2), 2.81 (m, 2), 3.31-3.83 (m, 10), 4.04 (q, 2), 4.21-4.42 (m, 6),    5.05 (m, 1), 6.96 (s, 1), 7.36 (t, 1), 7.46 (d, 1), 8.17 (d, 1),    8.88 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-8-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.72 (m, 1), 1.85 (m, 1), 1.92 (m, 2),    2.12 (m, 2), 2.30 (m, 2), 2.7.0 (s, 3), 2.72 (m, 2), 3.40 (m, 8),    3.62 (m, 2), 4.02 (q, 2), 4.98 (m, 1), 7.10 (s, 1), 7.46 (t, 1),    7.60 (6, 1), 8.04 (d, 1), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(diethylamino)methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.16 (t, 3), 2.18 (t, 6), 1.83 (m, 1), 2.04 (m, 3),    2.28 (m, 2), 2.58 (m, 2), 2.84 (m, 2), 3.18 (m, 4), 3.40 (m, 6),    3.62 (m, 2), 4.04 (q, 2), 4.58 (s, 2), 5.00 (m, 1), 7.06 (s, 1),    7.98 (d, 1), 87.82 (d, 1), 8.42 (s, 1), 8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(diethylamino)methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.14 (t, 3), 1.18 (t, 6), 1.83 (m, 1), 2.04 (m, 3),    2.28 (m, 2), 2.58 (m, 2), 2.80 (m, 2), 3.18 (m, 4), 3.40 (m, 6),    3.62 (m, 2), 4.04 (q, 2), 4.58 (s, 2), 5.00 (m, 1), 7.06 (s, 1),    7.78 (d, 1), 8.34 (s, 1), 8.38 (d, 1), 8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(benzyloxy)-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.83 (m, 1), 1.94-2.08 (m, 3), 2.29 (m,    2), 2.57 (m, 2), 2.80 (m, 2), 3.31-3.67 (m, 8), 4.02 (q, 4), 4.98    (m, 1), 5.27 (s, 2), 7.00 (s, 1), 7.35-7.64 (m, 7), 8.01 (d, 1),    8.81 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(carboxy)methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.83 (m, 1), 2.02 (m, 3), 2.28 (m, 2),    2.56 (m, 2), 2.78 (m, 2), 3.30-3.70 (m, 8), 4.03 (q, 2), 4.86 (s,    2), 4.98 (m, 1), 7.01 (s, 1), 7.44 (s, 1), 7.56 (d, 1), 8.03 (d, 1),    8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.29 (t, 3), 1.80 (m, 1), 1.98 (m, 3),    2.30 (m, 2), 2.58 (m, 2), 2.78 (m, 2), 3.30-3.63 (m, 8), 4.02 (q,    2), 4.19 (q, 2), 4.98 (m, 1), 7.00 (s, 1), 7.47 (m, 2), 7.98 (d, 1),    8.80 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.82 (m, 1), 1.98 (m, 3), 2.30 (m, 2),    2.58 (m, 2), 2.79 (m, 2), 3.35-3.65 (m, 8), 3.91 (s, 3), 4.02 (q,    2), 4.98 (m, 1), 7.01 (s, 1), 7.30 (m, 1), 7.98 (d, 1), 8.80 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(1-methylethoxy)-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.35 (d, 6), 1.83 (m, 1), 2.01 (m, 3),    2.28 (m, 2), 2.57 (m, 2), 2.78 (m, 2), 3.30-3.70 (m, 8), 4.04 (q,    2), 4.84 (m, 1), 4.98 (m, 1), 7.00 (s, 1), 7.47 (d, 1), 7.51 (s, 1),    7.97 (d, 1), 8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.2 (t, 3), 1.9 (m, 3), 2.0-2.15 (m, 3), 2.4 m, 2), 2.6    (m, 2), 2.9 (m, 2), 3.3-3.75 (m, 8), 5.1 (m, 1), 7.0 (s, 1), 7.4 (t,    1), 7.7 (d, 1), 8.3 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(trifluoromethyl)-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.84 (m, 1), 2.04 (m, 3), 2.28 (m, 2),    2.60 (m, 2), 2.80 (m, 2), 2.86 (s, 3), 3.44 (m, 6), 3.62 (m, 2),    4.03 (q, 2), 5.00 (m, 1), 7.18 (s, 1), 7.96 (d, 1), 8.42 (s, 1),    8.46 (d, 1), 8.94 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.19 (t, 3), 2.00 (m, 1), 2.15 (m, 1), 2.35 (m, 1),    2.60 (m, 2), 2.80 (m, 2), 2.90-3.05 (m, 2), 3.30-3.65 (m, 8), 4.05    (q, 2), 5.10 (m, 1), 7.05 (s, 1), 7.70 (t, 1), 7.90 (t, 1), 7.95 (s,    1), 8.10 (d, 1), 8.30 (d, 1), 9.05 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-(aminocarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.25 (t, 3), 1.80 (m, 1), 2.00 (m, 2), 2.30 (m, 2), 2.15    (m, 1), 2.30-2.50 (m, 3), 2.60 (m, 1), 2.80 (m, 1), 3.00 (m, 1),    3.40-3.75 (m, 8), 4.15 (q, 2), 5.24 (m, 1), 6.20 (s, 1), 6.90 (s,    1), 7.15 (s, 1), 7.55 (d, 1), 8.10 (s, 1), 8.20 (d, 1), 9.00 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(hydroxymethyl)-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.82 (m, 1), 3.00 (m, 3), 2.30 (m, 2),    2.58 (m, 2), 2.78 (m, 2), 3.30-3.65 (m, 8), 4.02 (q, 2), 4.70 (s,    2), 5.00 (m, 1), 7.00 (s, 1), 7.60 (d, 1), 8.00 (s, 1), 8.20 (d, 1),    8.92 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-ethyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.25 (t, 2), 1.82 (m, 1), 2.00 (m, 3),    2.28 (m, 2), 2.56 (m, 2), 2.82 (m, 4), 3.40 (m, 6), 3.62 (m, 2),    4.00 (q, 2), 5.00 (m, 1), 6.98 (s, 1), 7.55 (dd, 1), 7.85 (s, 1),    8.15 (d, 1), 8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-cyano-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.83 (m, 1), 2.00 (m, 3), 2.30 (m, 2),    2.60 (m, 2), 2.80 (m, 2), 3.30-3.62 (m, 8), 4.05 (q, 2), 5.00 (m,    1), 7.14 (s, 1), 7.98 (d, 1), 8.40 (d, 1), 8.64 (s, 1), 8.90 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-cyano-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.84 (m, 1), 2.02 (m, 3), 2.28 (m, 2),    2.67 (m, 2), 2.78 (m, 2), 3.30-3.70 (m, 8), 4.03 (q, 2), 5.02 (m,    1), 7.12 (s, 1), 7.96 (t, 1), 8.25 (d, 1), 8.40 (d, 1), 8.92 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-nitro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.30 (t, 3), 1.90 (m, 1), 2.0-2.30 (m, 4), 2.50 (m, 2),    2.70 (m, 1), 2.95 (m, 2), 3.40-3.85 (m, 8), 4.10 (q, 2), 5.20 (m,    1), 7.10 (s, 1), 8.25 (m, 1), 8.45 (d, 1), 8.80 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-carboxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.30 (t, 3), 1.90 (m, 1), 2.15 (m, 3), 2.45 (m, 3), 2.50    (m, 1), 2.99 (m, 2), 3.40-3.80 (m, 8), 4.15 (q, 2), 5.20 (m, 1),    7.20 (s, 1), 8.10 (d, 1), 8.30 (d, 1), 9.0 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-amino-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.25 (t, 3), 1.9-2.25 (m, 4), 2.45 (m, 2), 2.6 (m, 2),    2.95 (m, 2), 3.4-3.8 (m, 8), 4.10 (q, 2), 5.15 (m, 1), 6.8 (s, 1),    7.0 (s, 1), 7.1 (d, 1), 8.05 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(trifluoromethoxy)-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.85 (m, 1), 2.02 (m, 3), 2.28 (m, 2),    2.58 (m, 2), 2.78 (m, 2), 3.36 (m, 4), 3.48 (m, 2), 3.63 (m, 2),    4.02 (q, 2), 5.00 (m, 1), 7.06 (s, 1), 7.68 (dd, 1), 7.98 (s, 1),    8.38 (d, 1), 8.92 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.05 (t, 3), 1.15 (t, 3), 2.00 (m, 2), 2.15 (m, 1),    2.25 (m, 1), 2.60 (m, 2), 2.75-3.00 (m, 4), 3.25-3.61 (m, 8), 4.03    (q, 2), 4.15 (q, 2), 5.05 (m, 1), 6.95 (s, 1), 7.65 (t, 2), 7.85 (t,    2), 8.05 (d, 2), 8.25 (d, 2), 9.05 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 2.00 (m, 2), 2.15 (m, 1), 2.25 (m, 1),    2.55 (s, 3), 2.60 (m, 2), 2.75-3.00 (m, 4), 3.25-3.61 (m, 8), 4.03    (q, 2), 4.15 (q, 2), 5.05 (m, 1), 6.95 (s, 1), 7.50 (d, 1), 7.88 (s,    1), 8.15 (d, 2), 9.05 (d, 2) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((trifluoromethyl)sulfonylamino)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.05 (t, 3), 1.15 (t, 3), 1.90-2.10 (m, 4), 2.5 (s,    3), 2.60 (m, 2), 2.80 (m, 2), 3.15-3.60 (m, 10), 4.00 (q, 2), 4.15    (q, 2), 5.05 (m, 1), 6.95 (s, 1), 7.55 (d, 2), 7.85 (s, 1), 8.17 (d,    2), 9.03 (d, 2), 9.41 (br t, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((trifluoromethyl)sulfonylamino)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.90-2.10 (m, 4), 2.5 (s, 3), 2.60 (m,    2), 2.80 (m, 2), 3.15-3.60 (m, 10), 4.00 (q, 2), 4.15 (q, 2), 5.05    (m, 1), 6.95 (s, 1), 7.55 (d, 2), 7.85 (s, 1), 8.17 (d, 2), 9.03 (d,    2), 9.41 (br t, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-trifluoromethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.85 (m, 1), 2.02 (m, 3), 2.28 (m, 2),    2.60 (m, 2), 2.68 (m, 2), 3.40 (m, 6), 3.63 (m, 2), 4.02 (q, 2),    4.98 (m, 1), 7.08 (s, 1), 7.85 (dd, 1), 8.10 (s, 1), 8.22 (d, 1),    8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-tetrazol-5-ylethoxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.80-1.88 (m, 4), 2.00 (m, 1), 2.30 (m,    2), 2.55 (s, 3), 3.35-3.65 (m, 8), 4.02 (q, 2), 5.01 (m, 1), 6.42    (q, 1), 7.55 (d, 1), 7.60 (d, 1), 7.88 (s, 1), 8.16 (d, 1), 8.88    (m, 1) ppm; and NMR (DMSO-d₆) 1.18 (t, 3), 1.78-1.82 (m, 4), 2.00    (m, 1), 2.30 (m, 2), 2.55 (s, 3), 3.35-3.62 (m, 8), 4.05 (q, 2),    5.04 (m, 1), 6.44 (m, 1), 7.55 (d, 1), 7.60 (s, 1), 7.88 (s, 1),    8.16 (d, 1), 8.88 (d, 1), 12.16 (s, 1) ppm; and NMR (DMSO-d₆) 1.18    (t, 3), 1.78-1.90 (m, 4), 2.00 (m, 1), 2.30 (m, 2), 2.55 (s, 3),    3.35-3.65 (m, 8), 4.02 (q, 2), 5.00 (m, 1), 6.45 (q, 1), 7.55 (d,    1), 7.62 (s, 1), 7.88 (s, 1), 8.16 (d, 1), 8.88 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-acetyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.85 (m, 2), 2.00 (m, 3), 2.30 (m, 2),    2.60 (m, 2), 2.75 (s, 3), 2.80 (m, 2), 3.40 (m, 6), 3.65 (m, 2),    4.05 (m, 2), 5.05 (m, 1), 7.15 (s, 1), 8.10 (d, 1), 8.35 (d, 1),    8.70 (s, 1), 8.92 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-ethoxycarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.25 (t, 3), 1.35 (t, 3), 2.0 (m, 2), 2.20 (m, 2), 2.45    (m, 2), 2.60 (m, 2), 2.90 (m, 2), 3.40-3.80 (m, 8), 4.10 (q, 2),    4.40 (q, 2), 5.20 (m, 1), 7.20 (s, 1), 7.60 (d, 1), 7.85 (m, 1),    8.20 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(tetrazol-5-yl)methoxyquinoline;    NMR (DMSO-d₆) 1.13 (t, 3), 1.81 (m, 1), 1.98 (m, 1), 2.37 (m, 2),    2.50 (s, 3), 2.56 (m, 2), 3.40 (m, 6), 3.62 (m, 2), 4.00 (q, 2),    5.00 (m, 1), 5.85 (s, 1), 7.50 (dd, 1), 7.67 (s, 1), 7.85 (s, 1),    8.14 (d, 1), 8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-ethyl-4-(1carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.16 (t, 3), 1.27 (t, 2), 1.82 (m, 1), 2.00 (m, 3),    2.28 (m, 2), 2.56 (m, 2), 2.84 (m, 4), 3.40 (m, 6), 3.64 (m, 2),    4.03 (q, 2), 4.98 (m, 1), 7.02 (s, 1), 7.72 (dd, 1), 8.00 (d, 1),    8.02 (d, 1), 8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-acetyl-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-carboxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.30 (t, 3), 2.20 (m, 4), 2.50 (m, 2), 2.70 (m, 2), 2.95    (m, 2), 3.40-3.80 (m, 8), 4.15 (q, 2), 5.20 (m, 1), 7.20 (s, 1),    8.20 (d, 1), 8.40 (d, 1), 8.75 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.19 (t, 3), 1.85 (m, 2), 2.00 (m, 3), 2.30 (m, 2),    2.58 (m, 2), 2.80 (m, 2), 3.40 (m, 6), 3.60 (m, 2), 4.05 (m, 2),    5.00 (m, 1), 7.05 (s, 1), 7.60 (br s, 1), 8.15 (d, 1), 8.30 (d, 1),    8.38 (br s, 1), 8.80 (s, 1), 8.94 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.61 (s, 3), 1.63 (s, 3), 1.75 (m, 1),    2.00 (m, 1), 2.5 (s, 4), 3.15-3.63 (m, 8), 4.02 (q, 2), 5.05 (m, 1),    7.30 (s, 1), 7.50 (d, 2), 7.85 (s, 1), 8.10 (d, 1), 8.95 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.30 (t, 3), 2.20 (m, 4), 2.45 (m, 2), 2.65 (m, 2), 2.90    (m, 2), 3.40-3.80 (m, 8), 4.0 (s, 6), 4.10 (q, 2), 5.20 (m, 1), 7.05    (s, 1), 7.45 (s, 1), 7.55 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.04 (t, 3), 1.15 (t, 3), 1.82 (m, 1), 2.00 (m, 3),    2.28 (m, 2), 2.55 (s, 3), 2.60 (m, 2), 2.67 (m, 2), 3.40 (m, 6),    3.62 (m, 2), 4.02 (q, 2), 4.15 (q, 2), 4.98 (m, 1), 6.95 (s, 1),    8.15 (s, 1), 8.22 (s, 1), 8.83 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.85 (m, 1), 2.00 (m, 3), 2.28 (m, 2),    2.55 (s, 3), 2.57 (m, 2), 2.67 (m, 2), 3.40 (m, 6), 3.62 (m, 2), 4.0    (q, 2), 4.98 (m, 1), 7.00 (s, 1), 8.12 (s, 1), 8.20 (s, 1), 8.83    (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.30 (m, 2),    2.52 (s, 3), 2.57 (m, 2), 2.67 (m, 2), 3.40 (m, 6), 3.62 (m, 2),    4.02 (q, 2), 4.98 (m, 1), 7.00 (s, 1), 8.09 (s, 1), 8.21 (s, 1),    8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CD₃ OD) 1.20 (t, 3), 1.30 (t, 3), 2.20 (m, 4), 2.45 (m, 2),    2.70 (m, 2), 3.0 (m, 2), 3.40-3.80 (m, 8), 4.0 (s, 6), 4.15 (q, 2),    4.25 (q, 2), 5.20 (m, 1), 7.05 (s, 1), 7.50 (s, 1), 7.60 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(carboxy)ethoxy)quinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.65 (d, 3), 1.83 (m, 1), 2.04 (m, 1),    2.32 (m, 2), 2.56 (s, 3), 3.35-3.70 (m, 8), 4.05 (q, 2), 5.04 (m,    1), 5.28 (m, 1), 7.37 (s, 1), 7.55 (d, 1), 7.88 (s, 1), 8.13 (d, 1),    8.90 (d, 1) ppm; and NMR (DMSO-d₆) 1.18 (t, 3), 1.65 (d, 3), 1.84    (m, 1), 2.00 (m, 1), 2.30 (m, 2), 2.55 (s, 3), 3.35-3.65 (m, 8),    4.02 (q, 2), 5.01 (m, 1), 6.28 (q, 1), 7.38 (s, 1), 7.50 (d, 1),    7.87 (s, 1), 8.12 (d, 1), 8.90 (m, 1) ppm; and NMR (DMSO-d₆) 1.18    (t, 3), 1.65 (d, 3), 1.84 (m, 1), 2.00 (m, 1), 2.30 (m, 2), 2.55 (s,    3), 3.35-3.65 (m, 8), 4.02 (q, 2), 5.01 (m, 1), 6.35 (q, 1), 7.36    (s, 1), 7.50 (d, 1), 7.86 (s, 1), 8.12 (d, 1), 8.90 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.02 (t, 3), 1.18 (t, 3), 1.81 (m, 1), 2.00 (m, 3),    2.30 (m, 2), 2.48 (s, 3), 2.60 (m, 2), 2.79 (m, 2), 3.35-3.65 (m,    8), 4.02 (q, 2), 4.15 (q, 2), 5.00 (m, 1), 6.85 (s, 1), 7.85 (d, 1),    8.05 (d, 1), 8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.81 (m, 1), 2.00 (m, 3), 2.30 (m, 2),    2.48 (s, 3), 2.58 (m, 2), 2.79 (m, 2), 3.35-3.62 (m, 8), 4.05 (q,    2), 5.00 (m, 1), 7.03 (s, 1), 7.84 (d, 1), 8.05 (d, 1), 8.84 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.87 (m, 1), 2.00 (m, 4), 2.30 (m, 2),    2.58 (m, 2), 2.80 (m, 2), 3.40 (m, 6), 3.60 (m, 2), 4.05 (m, 2),    5.00 (m, 1), 7.08 (s, 1), 7.78 (m, 1), 7.92 (d, 1), 8.38 (m, 1),    8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.02 (t, 3), 1.15 (t, 3), 1.85 (m, 1), 2.00 (m, 3),    2.28 (m, 2), 2.54 (s, 3), 2.53 (m, 2), 2.67 (m, 2), 3.40 (m, 6),    3.62 (m, 2), 4.02 (q, 2), 4.15 (q, 2), 4.98 (m, 1), 6.97 (s, 1),    8.10 (s, 1), 8.23 (s, 1), 8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-fluoro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.04 (t, 3), 1.18 (t, 3), 1.83 (m, 1), 2.00 (m, 3),    2.30 (m, 2), 2.62 (m, 2), 2.78 (m, 2), 3.35-3.65 (m, 8), 4.03 (q,    2), 4.16 (q, 2), 5.00 (m, 1), 7.00 (s, 1), 8.17 (d, 1), 8.37 (d, 1),    8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.30 (m, 2),    2.58 (m, 2), 2.79 (m, 2), 3.35-3.65 (m, 8), 4.05 (q, 2), 5.00 (m,    1), 7.05 (s, 1), 8.15 (d, 1), 8.35 (d, 1), 8.84 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-bromo-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.19 (t, 3), 1.85 (m, 1), 2.00 (m, 3), 2.28 (m, 2),    2.55 (m, 2), 2.80 (m, 2), 3.38 (m, 6), 3.62 (m, 2), 4.05 (m, 2),    4.95 (m, 1), 7.05 (s, 1), 7.82 (d, 1), 8.20 (d, 1), 8.30 (s, 1),    8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(tetrazol-5-yl)ethyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.19 (t, 3), 2.00 (m, 2), 2.50 (s, 3), 2.50-2.60 (m,    2), 2.80 (m, 2), 3.30-3.60 (m, 8), 4.00 (q, 2), 5.40 (m, 1), 6.95    (s, 1), 7.0 (d, 2), 7.88 (s, 1), 8.15 (d, 1), 9.25 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.02 (t, 3), 1.18 (t, 3), 1.82 (m, 1), 2.00 (m, 3),    2.30 (m, 2), 2.58 (m, 2), 2.79 (m, 2), 3.35-3.65 (m, 8), 3.93 (s,    3), 4.05 (q, 2), 4.13 (q, 2), 5.00 (m, 1), 6.88 (s, 1), 7.30 (d, 1),    7.43 (s, 1), 8.16 (d, 1), 8.84 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.02 (t, 3), 1.15 (t, 3), 1.82 (m, 1), 2.00 (m, 3),    2.28 (m, 2), 2.55 (m, 2), 2.77 (m, 2), 3.30-3.65 (m, 8), 4.02 (q,    2), 4.15 (q, 2), 4.96 (m, 1), 6.80 (s, 1), 7.20 (d, 1), 7.27 (s, 1),    8.10 (d, 1), 8.84 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.28 (m, 2),    2.55 (m, 2), 2.76 (m, 2), 3.35-3.65 (m, 8), 4.02 (q, 2), 4.96 (m,    1), 6.86 (s, 1), 7.20 (d, 1), 7.28 (s, 1), 8.09 (d, 1), 8.85 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.05 (t, 3), 1.15 (t, 3), 1.82 (m, 1), 2.00 (m, 3),    2.28 (m, 2), 2.46 (s, 6), 2.57 (m, 2), 2.79 (m, 2), 3.40 (m, 6),    3.62 (m, 2), 4.05 (q, 2), 4.12 (q, 2), 4.98 (m, 1), 6.92 (s, 1),    7.92 (s, 1), 8.02 (s, 1), 8.92 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.81 (m, 1), 2.00 (m, 3), 2.28 (m, 2),    2.45 (s, 6), 2.55 (m, 2), 2.75 (m, 2), 3.40 (m, 6), 3.62 (m, 2),    4.05 (q, 2), 5.00 (m, 1), 6.98 (s, 1), 7.98 (s, 1), 8.14 (s, 1),    8.84 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.08 (t, 3), 1.17 (t, 3), 1.82 (m, 1), 2.00 (m, 3),    2.28 (m, 2), 2.62 (m, 2), 2.70 (m, 2), 3.40 (m, 6), 3.60 (m, 2),    4.02 (q, 2), 4.04 (s, 3), 4.15 (q, 2), 4.98 (m, 1), 6.95 (s, 1),    7.58 (s, 1), 8.18 (s, 1), 8.78 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.28 (m, 2),    2.58 (m, 2), 2.76 (m, 2), 3.38 (m, 6), 3.62 (m, 2), 4.02 (q, 2),    4.04 (s, 3), 4.98 (m, 1), 7.02 (s, 1), 7.60 (s, 1), 8.18 (s, 1),    8.80 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.26 (t, 3), 2.0 (s, 3), 2.1-2.2 (m, 4), 2.4 m, 2),    2.6(m, 2), 2.9(m, 2), 3.5-3.8 (m, 8), 4.10 (q, 2), 5.18(m, 1) 7.2    (s, 1), 8.25 (s, 1), 8.42 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)propoxy)quinoline;    NMR (DMSO-d₆) 1.05 (t, 3), 1.15 (m, 6), 1.82 (m, 1), 2.04 (m, 3),    2.28 (m, 2), 2.53 (s, 3), 3.38 (m, 6), 3.64 (m, 2), 4.05 (q, 2),    4.18 (q, 2), 5.00 (m, 1), 5.28 (m, 1), 7.36 (s, 1), 7.52 (dd, 1),    7.88 (s, 1), 8.15 (d, 1), 8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxypropoxy)quinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 1.25 (t, 3), 1.82 (m, 1), 2.05 (m, 3),    2.30 (m, 2), 2.53 (s, 3), 3.42 (m, 6), 3.64 (m, 2), 4.05 (q, 2),    5.02 (m, 1), 5.12 (m, 1), 7.35 (s, 1), 7.52 (dd, 1), 7.88 (s, 1),    8.14 (d, 1), 8.90 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)-2-methylpropoxy)quinoline;    NMR (DMSO-d₆) 1.05 (m, 9), 1.82 (m, 1), 1.85 (m, 1), 2.05 (m, 1),    2.25 (m, 2), 2.35 (m, 1), 2.52 (s, 3), 3.42 (m, 6), 3.64 (m, 2),    4.04 (q, 2), 4.15 (q, 2), 5.02 (m, 1), 5.13(m, 1), 7.33 (s, 1), 7.55    (d, 1), 7.88 (s, 1), 8.15(d, 1), 8.88 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxy-2-methylpropoxy)quinoline;    NMR (DMSO-d₆) 1.10 (t, 6), 1.15 (t, 3), 1.82 (m, 1), 1.85 (m, 1),    2.05 (m, 1), 2.30 (m, 2), 2.35 (m, 1), 2.53 (s, 3), 3.40 (m, 6),    3.64 (m, 2), 4.03 (q, 2), 5.00 (m, 2), 7.35 (s, 1), 7.52 (d, 1),    7.88 (s, 1), 8.1 (d, 1), 8.92 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-difluoro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.26 (t, 3), 2.0 (s, 3), 2.1-2.25 (m, 4), 2.45 (m, 2),    2.65 (m, 2), 2.95 (m, 2), 3.45-3.80 (m, 8), 4.15 (q, 2), 5.2(m, 1),    7.2 (s, 1), 7.96 (dd, 1), 8.10 (dd, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-fluoro-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.25 (t, 3), 2.0 (m, 1), 2.05-2.20 (m, 4), 2.45 (m, 2),    2.5 (s, 3), 2.65 (m, 2), 2.95 (m, 2), 3.4-3.8 (m, 8), 4.15 (q, 2),    5.1(m, 1), 7.1 (s, 1), 7.65 (d, 1), 8.18 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-fluoro-6-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.15 (t, 3), 1.3 (t, 3), 2.0 (m, 1), 2.05-2.25 (m, 3),    2.45 (m, 2), 2.55 (s, 3), 2.65 (m, 2), 2.90 (m, 2), 3.4-3.8 (m, 8),    4.15 (q, 2), 4.21 (q, 2), 5.2 (m, 1), 7.06 (s, 1), 7.7 (d, 1), 8.2    (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.18 (t, 3), 1.25 (m, 6), 1.90-2.25 (m, 4), 2.93-2.65    (m, 7), 2.90-3.00 (m, 2), 3.40-3.80 (m, 8), 4.10-4.23 (m, 6), 5.21    (m, 1), 7.03 (s, 3), 7.40 (d, 1), 7.85 (s, 1), 8.18 (d, 1), 8.93    (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dichloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.16 (t, 3), 1.25 (t, 3), 2.0 (m, 1), 2.18 (m, 3), 2.46    (m, 2), 2.70 (m, 2), 2.95 (m, 2), 3.4-3.8 (m, 8), 4.15 (q, 2), 4.25    (q, 2), 5.2 (m, 1), 7.1 (s, 1), 8.3 (s, 1), 8.4 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.18 (t, 3), 1.25 (m, 6), 1.94 (m, 1), 2.03-2.24 (m, 3),    2.41-2.52 (m, 5), 2.62 (m, 2), 2.93 (m, 2), 3.41-3.78 (m, 8),    4.11-4.26 (m, 6), 5.21 (m, 1), 7.07 (s, 1), 7.82 (d, 1), 7.93 (d,    1), 8.86 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.09 (t, 3), 1.17 (t, 3), 1.84 (m, 1), 2.94-2.07 (m,    3), 2.36 (m, 2), 2.48 (s, 3), 2.56 (m, 2), 2.77 (m, 2), 3.28-3.64    (m, 8), 3.98 (q, 2), 4.02 (q, 2), 4.98 (m, 1), 7.01 (s, 1), 7.84 (d,    1), 8.05 (d, 1), 8.83 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.06-1.18 (m, 9), 1.84 (m, 1), 2.94-2.07 (m, 3), 2.36    (m, 2), 2.48 (s, 3), 2.57 (m, 2), 2.77 (m, 2), 3.28-3.64 (m, 8),    4.02 (q, 2), 4.83 (m, 1), 4.98 (m, 1), 7.01 (s, 1), 7.84 (d, 1),    8.05 (d, 1), 8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.10 (t, 3), 1.18 (t, 3), 1.85 (m, 1), 2.00 (m, 3),    2.35 (m, 2), 2.41-2.60 (m, 2), 2.78 (m, 2), 3.30-3.62 (m, 8), 4.00    (m, 4), 5.00 (m, 1), 6.98 (s, 3), 7.50 (d, 1), 7.83 (s, 1), 8.15 (d,    1), 8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.05-1.20 (m, 9), 1.79-1.93 (m, 1), 2.00 (m, 3), 2.30    (m, 2), 2.51 (m, 4), 2.78 (m, 2), 3.23-3.61 (m, 10), 4.02 (q, 2),    4.82 (m, 1), 4.98 (m, 1), 6.98 (s, 1), 7.53 (d, 1), 7.85 (d, 1),    8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.12 (t, 3), 1.16 (t, 3), 1.18 (t, 3), 1.86 (m, 1),    1.96 (m, 2), 2.32 (m, 2), 2.56 (s, 3), 2.60 (m, 2), 2.80 (m, 2),    3.40 (m, 10), 3.98 (q, 2), 4.00 (q, 2), 4.16 (q, 2), 5.00 (m, 1),    6.96 (s, 1), 8.12 (s, 1), 8.22 (s, 1), 8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.12 (t, 3), 1.16 (t, 3), 1.86 (m, 1), 1.96 (m, 2),    2.02 (m, 3), 2.36 (m, 2), 2.56 (s, 3), 2.58 (m, 2), 3.40 (m, 10),    4.02 (q, 2), 4.08 (m, 2), 5.00 (m, 1), 7.00 (s, 1), 8.18 (s, 1),    8.22 (s, 1), 8.84 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.12 (d, 6), 1.20 (m, 5), 1.96 (m, 1), 2.56 (s, 3),    2.64 (m, 2), 2.76 (m, 2), 3.40 (m, 9), 2.75 (m, 2), 3.64 (m, 2),    4.05 (q, 2), 4.82 (m, 1), 5.00 (m, 1), 7.00 (s, 1), 8.18 (s, 1),    8.24 (s, 1), 8.84 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.02 (t, 3), 1.09 (t, 3), 1.18 (t, 3), 1.85 (m, 1),    2.02 (m, 3), 2.35 (m, 2), 2.42 (br s, 6), 2.58 (m, 2), 2.80 (m, 2),    3.23-3.62 (m, 8), 3.95-4.05 (m, 4), 4.15 (q, 2), 5.00 (m, 1), 6.92    (s, 1), 7.83 (s, 1), 7.99 (s, 1), 8.80 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.08-1.20 (m, 6), 1.81 (m, 1), 2.00 (m, 2), 2.25-2.40    (m, 12), 2.78 (m, 2), 3.25-3.80 (m, 8), 4.00 (m, 4), 5.00 (m, 1),    8.97 (s, 1), 7.82 (s, 1), 7.98 (s, 1), 8.82 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.03-1.20 (m, 9), 1.81 (m, 1), 2.00 (m, 2), 2.30-2.40    (m, 12), 2.78 (m, 2), 3.20-3.40 (m, 8), 4.02 (m, 2), 4.83 (m, 1),    5.00 (m, 1), 8.97 (s, 1), 7.82 (s, 1), 7.98 (s, 1), 8.80 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.20 (t, 3), 1.30 (t, 3), 2.0 (m, 1), 2.20 (m, 3), 2.45    (m, 2), 2.70 (m, 2), 2.95 (m, 2), 3.40-3.80 (m, 8), 4.10 (m, 4),    5.20 (m, 1), 7.20 (s, 1), 8.30 (s, 1), 8.40 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.25 (m, 9), 2.0 (m, 1), 2.20 (m, 3), 2.40 (m, 2), 2.65    (m, 2), 2.95 (m, 2), 3.40-3.80 (m, 8), 4.10 (q, 2), 4.95 (m, 1),    5.15 (m, 1), 7.20 (s, 1), 8.25 (s, 1), 8.40 (s, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CDCl₃) 1.20 (t, 3), 1.30 (t, 6), 1.95 (m, 1), 2.05-2.25 (m, 3),    2.45 (m, 2), 2.65 (m, 2), 2.95 (m, 2), 3.40-3.80 (m, 8), 4.20 (q,    4), 4.25 (q, 2), 5.20 (m, 1), 7.10 (s, 1), 8.25 (s, 1), 8.40 (s, 1),    8.85 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline;    NMR (DMSO-d₆) 1.08 (t, 3), 1.16 (t, 3), 1.74 (s, 6), 1.82 (m, 1),    2.00 (m, 1), 2.28 (m, 2), 2.52 (s, 3), 3.40 (m, 2), 3.62 (m, 2),    4.04 (q, 2), 4.14 (q, 2), 5.02 (m, 1), 7.18 (s, 1), 7.50 (dd, 1),    7.86 (s, 1), 8.08 (d, 1), 8.86 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline;    NMR (DMSO-d₆) 1.98 (t, 3), 1.22 (t, 3), 1.80 (br s, 6), 1.98 (m, 1),    2.15 (m, 1), 2.42 (m, 2), 2.61 (s, 3), 3.38-3.70 (m, 8), 4.08 (m,    4), 5.10 (m, 1), 7.18 (s, 1), 7.59 (d, 1), 7.97 (s, 1), 8.19 (d, 1),    8.99 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methylthio-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.20 (t, 3), 1.25 (t, 3), 1.95 (m, 1), 2.20 (m, 3), 2.40    (m, 2), 2.65 (s, 3), 2.70 (m, 2), 2.95 (m, 2), 3.40-3.80 (m, 8),    4.10 (q, 2), 4.20 (q, 2), 5.20 (m, 1), 7.10 (s, 1), 7.70 (m, 1), 8.0    (m, 2) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methylthio-4-(1-carboxycyclobut-1-oxy)quinoline;    NMR (CD₃OD) 1.30 (t, 3), 2.0 (m, 1), 2.20 (m, 3), 2.40 (m, 2), 2.60    (s, 3), 2.70 (m, 2), 2.95 (m, 2), 3.40-3.80 (m, 8), 4.10 (q, 2),    5.20 (m, 1), 7.20 (s, 1), 7.70 (d, 1), 8.0 (m, 2) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-cyclohexyl-1-carboxymethoxy)quinoline;    NMR (CD₃OD) 1.25 (t, 3), 1.30-1.40 (m, 4), 1.55 (m, 1), 1.75 (m, 1),    1.85-2.00 (m, 5), 2.20 (m, 2), 2.50 (m, 2), 2.60 (s, 3), 3.40-3.80    (m, 8), 4.15 (q, 2), 4.95 (m, 1), 5.20 (m, 1), 7.45 (s, 1), 7.55 (d,    1), 7.90 (s, 1), 8.25 (d, 1) ppm and NMR (CD₃OD) 1.25 (t, 3),    1.30-1.40 (m, 4), 1.55 (m, 1), 1.75 (m, 1), 1.90-2.00 (m, 5), 2.20    (m, 2), 2.45 (m, 2), 2.60 (s, 3), 3.40-3.80 (m, 8), 4.15 (q, 2),    4.95 (m, 1), 5.20 (m, 1), 7.45 (s, 1), 7.55 (m, 1), 7.90 (s, 1),    8.20 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-cyclohexyl-1-(methoxycarbonyl)methoxy)quinoline;    NMR (CD₃OD) 1.20 (t, 3), 1.25 (m, 4), 1.50 (m, 1), 1.70 (m, 1), 1.80    (m, 4), 1.90 (m, 1), 2.10 (m, 2), 2.40 (m, 2), 2.55 (s, 3),    3.40-3.80 (m, 8), 3.70 (s, 3), 4.05 (q, 2), 5.05 (m, 1), 5.15 (m,    1), 7.45 (s, 1), 7.55 (d, 1), 7.85 (s, 1), 8.20 (d, 1) ppm and NMR    (CD₃OD) 1.22 (t, 3), 1.25 (m, 4), 1.45 (m, 1), 1.70 (m, 1), 1.90 (m,    4), 2.0 (m, 1), 2.20 (m, 2), 2.45 (m, 2), 2.60 (s, 3), 3.40-3.80 (m,    8), 3.78 (s, 3), 4.10 (q, 2), 5.10 (m, 1), 5.25 (m, 1), 7.50 (s, 1),    7.60 (d, 1), 7.90 (s, 1), 8.25 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(methoxycarbonyl)cyclobut-1-oxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.82 (m, 1), 2.00 (m, 3), 2.30 (m, 2),    2.56 (s, 3), 2.59 (m, 3), 2,80 (m, 2), 3.30-3.50 (m, 6), 3.60 (m,    2), 3.64 (s, 3), 4.04 (q, 2), 4.98 (m, 1), 6.92 (s, 1), 7.55 (d, 1),    7.90 (s, 1), 8.17 (d, 1), 8.87 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(1-methylethoxycarbonyl)cyclobut-1-oxy)quinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.26 (t, 3), 1.74 (s, 6), 1.82 (m, 1),    2.00 (m, 1), 2.30 (m, 2), 2.54 (s, 3), 3.40 (m, 2), 3.62 (m, 2),    4.04 (q, 2), 4.16 (q, 2), 5.52 (m, 1), 7.10 (s, 1), 8.1 (s, 1), 8.18    (s, 1), 8.82 (d, 1) ppm;-   2-[11-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.72 (2s, 6), 1.84 (m, 1), 2.00 (m, 1),    2.30 (m, 2), 2.54 (s, 3), 3.36 (m, 1), 3.40 (m, 1), 3.48 (m, 1),    3.64 (m, 1), 4.06 (q, 2), 5.02 (m, 1), 7.30 (s, 1), 8.08 (s, 1),    8.16 (s, 1), 8.86 (d, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonylquinoline;    NMR (DMSO-d₆) 1.17 (t, 3), 3.34-3.57 (m, 8), 4.06 (q, 3), 4.28 (d,    2), 7.74 (t, 1), 7.90 (t, 1), 8.06-18 (m, 3), 8.60 (d, 1), 8.98    (t, 1) ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-hydroxyquinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 3.30-3.48 (m, 8), 4.04 (q, 2), 4.20 (d,    2), 6.75 (m, 1), 7.40 (m, 1), 7.70 (t, 1), 7.92 (d, 1), 8.06 (d, 1)    ppm;-   2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(n-propylsulfonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.94 (t, 3), 1.67 (m, 2), 3.02 (t, 2), 3.10-3.35 (m,    4), 3.57 (m, 4), 4.13 (s, 3), 4.26 (d, 2), 7.60 (s, 1), 7.66 (t, 1),    7.84 (t, 1), 8.04 (d, 1), 8.19 (d, 1), 8.96 (t, 1) ppm;-   2-[(4-(2,5-dibromophenyl)sulfonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 3.20-3.30 (m, 4), 3.58 (m, 4), 4.10 (s, 3), 4.25 (d,    2), 7.57 (s, 1), 7.64 (t, 1), 7.80 (m, 3), 8.02 (d, 1), 8.06 (s, 1),    8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-(2,6-difluorophenyl)sulfonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 3.10-3.20 (m, 4), 3.60 (m, 4), 4.10 (s, 3), 4.23 (d,    2), 7.34 (t, 1), 7.58 (s, 1), 7.64 (t, 1), 7.75-7.82 (m, 2), 8.02    (d, 1), 8.18 (d, 1), 8.88 (t, 1) ppm;-   2-[(4-(3-bromophenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(4-ethylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 2.60 (m, 2), 3.30-3.65 (m, 8), 4.12 (s,    3), 4.24 (d, 2), 7.26 (d, 2), 7.35 (d, 2), 7.60 (s, 1), 7.64 (t, 1),    7.83 (t, 1), 8.04 (d, 1), 8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-(4-n-propylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 0.94 (t, 3), 1.65 (m, 2), 2.62 (t, 2), 3.50-3.80 (m, 8),    4.15 (s, 3), 4.38 (d, 2), 7.24 (d, 2), 7.36 (d, 2), 7.56 (t, 1),    7.65 (s, 1), 7.75 (t, 1), 8.08 (d, 1), 8.23 (d, 1), 9.08 (t, 1) ppm;-   2-[(4-(4-n-butylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(phenoxymethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 3.40-3.60 (m, 8), 4.13 (s, 3), 4.26 (d, 2), 4.84 (s,    2), 6.93 (m, 3), 7.26 (m, 2), 7.60 (s, 1), 7.64 (t, 1), 7.83 (t, 1),    8.06 (d, 1), 8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-(2,2-dimethylpropyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.07 (s, 9), 2.32 (s, 2), 3.53-3.77 (m, 8), 4.15 (s, 3),    4.38 (d, 2), 7.57 (t, 1), 7.65 (s, 1), 7.74 (t, 1), 8.09 (d, 1),    8.13 (d, 1), 9.09 (t, 1) ppm;-   2-[(4-(2-ethoxycarbonylethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.15 (t, 3), 2.51 (m, 2), 2.60 (m, 2), 3.44-3.56 (m,    8), 4.01 (q, 2), 4.11 (s, 3), 4.27 (d, 2), 7.57 (s, 1), 7.64 (t, 1),    7.83 (t, 1), 8.04 (d, 1), 8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-(n-propyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.86 (t, 3), 1.51 (m, 2), 2.30 (m, 2), 3.40-3.58 (m,    8), 4.14 (s, 3), 4.27 (d, 2), 7.60 (s, 1), 7.64 (t, 1), 7.83 (t, 1),    8.04 (d, 1), 8.18 (d, 1), 8.96 (t, 1) ppm;-   2-[(4-(n-pentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.82 (t, 3), 1.23 (m, 6), 1.44 (m, 2), 2.30 (m, 2),    3.40-3.56 (m, 8), 4.12 (s, 3), 4.25 (d, 2), 7.60 (s, 1), 7.64 (t,    1), 7.83 (t, 1), 8.04 (d, 1), 8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-(furan-2-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 3.63 (m, 2), 3.83 (m, 6), 4.14 (s, 3), 4.39 (d, 1), 6.53    (m, 1), 7.08 (d, 1), 7.53 (d, 1), 7.57 (t, 1), 7.65 (s, 1), 7.74 (t,    1), 8.09 (d, 1), 8.13 (d, 1), 9.10 (t, 1) ppm;-   2-[(4-(thien-2-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 3.63 (m, 2), 3.83 (m, 6), 4.14 (s, 3), 4.38 (d, 1), 7.08    (m, 1), 7.35 (d, 1), 7.52 (d, 1), 7.58 (t, 1), 7.66 (s, 1), 7.74 (t,    1), 8.09 (d, 1), 8.13 (d, 1), 9.08 (t, 1) ppm;-   2-[(4-(2-phenylcyclopropyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;-   2-[(4-(2-bromo-5-methoxyphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 3.10-3.20 (m, 2), 3.48-3.72 (m, 6), 3.75 (s, 3), 4.10    (s, 3), 4.25 (d, 2), 6.85 (m, 2), 7.57-7.66 (m, 3), 7.83 (m, 1),    8.02 (d, 1), 8.18 (d, 1), 8.96 (t, 1) ppm;-   2-[(4-(n-butyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.82 (t, 3), 1.23 (m, 4), 1.44 (m, 2), 2.30 (m, 2),    3.40-3.60 (m, 8), 4.12 (s, 3), 4.25 (d, 2), 7.60 (s, 1), 7.64 (t,    1), 7.83 (t, 1), 8.04 (d, 1), 8.18 (d, 1), 8.94 (t, 1) ppm;-   2-[(4-(3-trifluoromethoxyphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 3.52-3.94 (m, 8), 4.15 (s, 3), 4.39 (d, 2), 7.25-7.41    (m, 3), 7.48 (d, 1), 7.58 (t, 1), 7.64 (s, 1), 7.75 (t, 1), 8.08 (d,    1), 8.13 (d, 1), 9.08 (t, 1) ppm;-   2-[(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.23 (s, 9), 3.24-3.33 (m, 4), 3.44 (m, 4), 4.12 (s,    3), 4.14 (d, 2), 5.88 (s, 1), 7.57 (s, 1), 7.64 (t, 1), 7.83 (t, 1),    8.03 (d, 1), 8.17 (d, 1), 8.92 (t, 1) ppm;-   2-[(4-((1-methylethyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.17 (d, 6), 3.36-3.78 (m, 8), 3.98 (m, 1), 4.12 (s, 3),    4.36 (d, 3), 7.58 (t, 1), 7.66 (s, 1), 7.75 (t, 1) ppm;-   2-[(4-((n-propyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.80 (t, 3), 1.39 (m, 2), 2.95 (m, 2), 3.30-3.46 (m,    8), 4.13 (s, 3), 4.25 (d, 2), 6.57 (t, 1), 7.60 (s, 1), 7.64 (t, 1),    7.83 (t, 1), 8.04 (d, 1), 8.18 (d, 1), 8.96 (t, 1) ppm;-   2-[(4-((n-butyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 0.92 (t, 3), 1.37 (m, 2), 1.52 (m, 2), 3.26 (m, 2), 3.40    (m, 2), 3.56 (m, 4), 3.64 (m, 2), 4.14 (s, 3), 4.26 (d, 2), 7.56 (t,    1), 7.66 (s, 1), 7.73 (t, 1), 8.10 (d, 1), 8.24 (d, 1), 9.10 (t, 1)    ppm;-   2-[(4-((n-hexyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.82 (t, 3), 1.23 (m, 6), 1.38 (m, 2), 2.97 (m, 2),    3.30-3.48 (m, 8), 4.12 (s, 3), 4.25 (d, 2), 6.54 (t, 1), 7.60 (s,    1), 7.64 (t, 1), 7.83 (t, 1), 8.04 (d, 1), 8.18 (d, 1), 8.94 (t, 1)    ppm;-   2-[(4-((n-pentyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.82 (t, 3), 1.23 (m, 4), 1.38 (m, 2), 2.97 (m, 2),    3.28-3.48 (m, 8), 4.12 (s, 3), 4.26 (d, 2), 6.53 (t, 1), 7.60 (s,    1), 7.64 (t, 1), 7.83 (t, 1), 8.04 (d, 1), 8.18 (d, 1), 8.94 (t, 1)    ppm;-   2-[(4-((ethoxycarbonyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 3.30-3.48 (m, 8), 4.06 (q, 2), 4.12 (s,    3), 4.25 (d, 2), 6.57 (t, 1), 7.59 (s, 1), 7.64 (t, 1), 7.83 (t, 1),    8.04 (d, 1), 8.18 (d, 1), 8.96 (t, 1) ppm;-   2-[(4-(morpholin-4-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 3.35 (m, 8), 3.58 (m, 2), 3.71 (m, 6), 4.14 (s, 3), 4.37    (d, 2), 7.56 (t, 1), 7.65 (s, 1), 7.74 (t, 1), 8.07 (d, 1), 8.13 (d,    1), 9.09 (t, 1) ppm;-   2-[(4-(pyridin-2-yl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 3.57 (m, 2), 3.69 (m, 4), 3.84 (m, 2), 4.15 (s, 3), 4.41    (d, 2), 6.70 (m, 2), 7.56 (m, 2), 7.67 (s, 1), 7.76 (t, 1), 8.10 (d,    1), 8.22 (d, 1), 9.15 (t, 1) ppm;-   2-[(4-(3-chlorophenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 3.25 (m, 4), 3.67 (m, 2), 3.86 (m, 2), 4.15 (s, 3), 4.19    (d, 2), 6.81 (d, 1), 6.91 (m, 2), 7.22 (t, 1), 7.57 (t, 1), 7.68 (s,    1), 7.74 (t, 1), 8.11 (d, 1), 8.23 (d, 1), 9.14 (t, 1) ppm;-   2-[(3-methyl-4-(3-methylphenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (DMSO-d₆) 0.83-0.95 (dd, 3), 2.23 (s, 3), 2.85-3.18 (m, 2),    3.30-4.42 (m, 10), 6.57 (d, 1), 6.68 (m, 2), 7.08 (t, 1), 7.60 (s,    1), 7.65 (t, 1), 7.84 (t, 1), 8.07 (d, 1), 8.18 (d, 1), 8.96 (t, 1)    ppm; and-   2-[(4-(3-methylphenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 2.35 (s, 3), 3.22 (m, 4), 3.66 (m, 2), 3.87 (m, 2), 4.15    (s, 3), 4.38 (d, 2), 6.77 (m, 3), 7.18 (t, 1), 7.57 (t, 1), 7.69 (s,    1), 7.75 (t, 1), 8.11 (d, 1), 8.22 (d, 1), 9.17 (t, 1) ppm.

EXAMPLE 3 Compounds of Formula (Ic)

A. To a solution of 2-((carboxy)methylcarbonylamino)naphthalene (1.2 g,5.2 mmol) in CH₂Cl₂ (40 mL) was added triethylamine (2.2 mL, 15.6 mmol)and 1-hydroxybenzotriazole (HOBT) (0.84 g, 6.2 mmol) and1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) (1.2 g, 6.2 mmol).After 5 minutes, 1-ethoxycarbonylpiperazine (0.84 mL, 5.3 mmol) wasadded and the reaction was stirred overnight. The reaction mixture wasevaporated in vacuo to afford an oil, which was dissolved in ethylacetate, and washed with saturated NaHCO₃, 1 M NaHSO₄ and brine. Theorganic layer was evaporated in vacuo to afford2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]aminonaphthalene(1.2 g), as a solid that was used without further purification.

B. In a similar manner, the following compounds of formula (Ic) wereprepared:

-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-5-hydroxynaphthalene;    (DMSO-d₆) 1.17 (t, 3), 3.28-3.60 (m, 10), 4.04 (q, 2), 6.72 (d, 1),    7.22 (m, 2), 7.24 (d, 1), 8.02 (d, 1), 8.17 (s, 1) ppm;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-4-methoxynaphthalene;    NMR (DMSO-d₆) 1.17 (t, 3), 3.30-3.60 (m, 10), 3.93 (s, 3), 4.03 (q,    2), 7.03 (s, 1), 7.34 (t, 1), 7.43 (t, 1), 7.73 (d, 1), 7.82 (s, 1),    8.01 (d, 1) ppm;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-5-(carboxymethoxy)naphthalene;    NMR (DMSO-d₆) 1.17 (t, 3), 3.30-3.60 (m, 10), 4.03 (q, 2), 6.73 (d,    1), 7.36 (m, 2), 7.52 (d, 1), 8.13 (d, 1), 8.21 (s, 1) ppm;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-5-(3-(ethoxycarbonyl)propoxy)naphthalene;    NMR (CDCl₃) 1.25 (m, 6), 2.24 (m, 2), 2.61 (t, 2), 3.52-3.71 (m,    10), 4.17 (m, 6), 6.73 (d, 1), 7.36 (m, 2), 7.45 (d, 1), 8.21 (m,    2), 9.93 (s, 1) ppm;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-5-(3-carboxypropoxy)naphthalene;    NMR (DMSO-d₆) 1.17 (t, 3), 2.04 (m, 2), 3.30-3.60 (m, 10), 4.03 (q,    2), 4.12 (t, 2), 6.79 (m, 1), 7.34 (m, 2), 7.47 (d, 1), 8.07 (d, 1),    8.21 (s, 1), 10.29 (s, 1) ppm and;-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-4-(carboxymethoxy)naphthalene.

EXAMPLE 4 Compounds of Formula (Id)

A. NaH 95% (15 mg, 0.6 mmol) was suspended in DMF (5 mL). A solution of2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]aminonaphthalene(160 mg, 0.43 mmol) in DMF (1 mL) was added dropwise. The reactionmixture was stirred at ambient temperature. After 5 minutes, a solutionof methyl 3-(bromomethyl) benzoate (99 mg, 0.43 mmol) in DMF (0.5 mL)was added. The reaction was quenched by water (100 mL) after 15 minutes,then extracted with ethyl acetate (80 mL). The organic layer wasevaporated in vacuo. Purification by flash column on silica gel affordeda solid,2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(methoxycarbonyl)phenyl)ethyl)carbonyl]-aminonaphthalene(195 mg, 0.38 mmol).

B. In a similar manner, the following compounds of formula (Id) wereprepared:

-   2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(tetrahydro-2-oxofuran-3-yl)methyl)carbonyl]aminonaphthalene;    NMR (CDCl₃) 1.24 (t, 3), 2.31-2.78 (m, 2), 3.41-3.90 (m, 10), 4.16    (q, 2), 4.28 (m, 1), 4.44 (m, 1), 7.42-7.56 (m, 3), 7.80 (m, 3),    8.23 (s, 1) ppm;-   2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxy-4-hydroxybutyl)carbonyl]aminonaphthalene;    NMR (CDCl₃) 1.25 (t, 3), 2.02 (m, 2), 2.34 (m, 1), 3.37 (m, 2), 3.57    (m, 2), 3.71-3.90 (m, 4), 3.95-4.12 (m, 2), 4.17 (q, 2), 4.25 (d,    1), 7.36 (d, 1), 7.56 (m, 2), 7.80 (s, 1), 7.91 (m, 2), 7.97 (d, 1)    ppm;-   2-[(-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(ethoxycarbonyl)ethyl)carbonyl]aminonaphthalene;    NMR (DMSO-d₆) 1.27 (m, 6), 2.87 (m, 2), 3.32-3.62 (m, 8), 4.03 (m,    4), 4.18 (m, 1), 7.38 (t, 1), 7.43 (t, 1), 7.56 (d, 1), 7.83 (m, 3),    8.22 (s, 1) ppm; and-   2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-(methoxycarbonyl)phenyl)ethyl)carbonyl]aminonaphthalene.    NMR (DMSO-d₆) 1.16 (t, 3), 3.17-3.36 (m, 6), 3.42-3.58 (m, 4), 3.79    (s, 3), 3.98 (q, 2), 4.17 (m, 1), 7.42 (m, 5), 7.80 (m, 5), 8.17    (s, 1) ppm.

C. To a solution of2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(methoxycarbonyl)phenyl)ethyl)carbonyl]aminonaphthalene(110 mg, 0.2 mmol) in THF (8 mL) was added a solution of LiOH (27 mg,0.6 mmol) in water (6 mL). The reaction mixture was stirred at ambienttemperature. After 5 hours, the reaction mixture was acidified to pH 2-3by 2N NaHSO₄,then extracted with ethyl acetate (3×10 mL). The organiclayer was dried over Na₂SO₄ and evaporated in vacuo to afford2-[(1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-carboxyphenyl)ethyl)carbonyl]aminonaphthalene(90 mg, 0.18 mmol); NMR (DMSO-d₆) 1.25 (t, 3), 3.10-3.30 (m, 6),3.40-3.60 (m, 4), 3.97 (q, 2), 4.14 (t, 1), 7.35-7.55 (m, 5), 7.70-7.87(m, 5), 8.14 (s, 1), 10.12 (s, 1) ppm.

D. In a similar manner, the following compounds were made:

-   2-[(-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl)carbonyl]aminonaphthalene;    NMR (CDCl₃) 1.27 (t, 3), 3.01 (m, 1), 3.32 (m, 2), 3.54 (m, 2), 3.81    (m, 3), 4.06 (m, 2), 4.17 (q, 2), 4.25 (m, 1), 7.34 (d, 1), 7.57 (m,    2), 7.79 (s, 1), 7.88 (m, 2), 7.94 (d, 1) ppm;-   2-[(-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-carboxyphenyl)ethyl)carbonyl]aminonaphthalene;    NMR (DMSO-d₆) 1.14 (t, 3), 3.17-3.33 (m, 6), 3.42-3.56 (m, 4), 3.98    (q, 2), 4.16 (m, 1), 7.37-7.47 (m, 5), 7.80 (m, 5), 8.16 (s, 1) ppm;    and-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-4-hydroxyquinoline;    NMR (CDCl₃) 1.26 (t, 3), 3.43-3.63 (m, 8), 1.17 (q, 2), 5.93 (s, 1),    7.24-7.35 (m, 3), 7.57 (t, 1), 8.23 (d, 1) ppm.

EXAMPLE 5 Compounds of Formulae (O), (If) and (Ig)

A. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-hydroxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline(380 mg, 0.75 mmol) in CH₂Cl₂ cooled to −30° C. was added triethylamine(0.12 mL, 1.12 mmol) and dimethylamino pyridine (20 mg, 1.6 mmol) andthe reaction mixture was stirred for 10 minutes.Triflouromethanesulfonic anhydride (0.19 mL, 1.12 mmol) was added andthe reaction mixture was slowly warmed to ambient temperature. Thesolvent was evaporated under reduced pressure and residue was purifiedby flash chromatography (ethyl acetate:hexane-30:70) to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-(trifluoromethylsulfonyl)oxyphenyl)ethyl]aminocarbonyl-4-methoxyquinolineas a yellow oil (320 mg).

B. In a similar manner, the following compounds were made:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-(trifluoromethylsulfonyl)oxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(trifluoromethylsulfonyl)oxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-(trifluoromethylsulfonyl)oxyphenyl)methyl]aminocarbonyl-4-methoxyquinoline.

C. Carbon monoxide was bubbled for 10 minutes to a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-(trifluoromethylsulfonyl)oxyphenyl)-ethyl]aminocarbonyl-4-methoxyquinoline(320 mg, 0.50 mmol) in a mixture of DMSO(3 mL), MeOH (2 mL) andtriethylamine (0.2 mL). Palladium acetate (60 mg) and2′,2′-bis(diphenylphosphino)-1,1-binaphthyl (200 mg) was added andreaction mixture was heated to 70° C. for 45 minutes. The reactionmixture was cooled to ambient temperature, filtered through celite andconcentrated under reduced pressure. Flash column chromatography(methanol:CH₂Cl₂, 1:99) afforded2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-methoxycarbonylphenyl)ethyl]aminocarbonyl-4-methoxyquinolineas an orange oil, 220 mg (80%); NMR (CDCl₃) 2.40 (t, 3), 3.4 (m, 10),3.88 (s, 3), 3.16 (q, 2), 3.18 (s, 3), 5.62 (m, 1), 7.26 (m, 2), 7.48(m, 2), 7.68 (m, 1). 7.92 (d, 1), 8.04 (d, 1), 8.20 (d, 1), 9.00 (d, 1)ppm.

D. In a similar manner, the following compound was made:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-(1,1-dimethylethoxy)carbonylphenyl)-ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 1.60 (s, 9), 3.02-3.60 (m, 10), 4.12 (m,    5), 5.40 (m, 1), 7.35 (d, 1), 7.58 (dd, 1), 7.82 (s, 1), 7.75 (dd,    1), 7.92 (d, 1), 8.05 (d, 1), 8.21 (d, 1), 8.99 (d, 1) ppm.

E. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-methoxycarbonylphenyl)ethyl]aminocarbonyl-4-methoxyquinoline(220 mg, 0.4 mmol) in methanol was added a solution of LiOH (3 mL, 0.25M) and the resulting reaction mixture was stirred at ambient temperatureovernight. The product was purified by preparative HPLC andlyophilization to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinolineas an orange solid, 140 mg (50%); NMR (DMSO-d₆), 1.08 (t, 3), 3.40 (m,10), 4.00 (q, 2), 4.04 (s, 3), 5.28 (m, 1), 7.26 (t, 1), 7.34 (m, 2),7.42 (s, 1), 7.82 (m, 2), 8.06 (d, 1), 8.14 (d, 1H), 8.88 (d, 1) ppm.

F. In a similar manner, the following compounds were made:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 3.20-4.80 (m, 8), 4.15 (q, 2), 4.30 (s, 3),    5.45 (m, 1), 7.32 (d, 2), 7.81 (dd, 1), 7.83 (s, 1), 7.95 (d, 1),    8.01 (dd, 1), 8.38 (d, 2) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-carboxyphenyl)methyl]aminocarbonyl-4-methoxyquinoline.

EXAMPLE 6 Compounds of Formula (Ih)

A. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-hydroxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline(200 mg, 0.39 mmol) in DMF (5 mL) was added CsCO₃ (260 mg, 0.8 mmol) andethyl bromoacetate (120 mg, 0.7 mmol) and the reaction mixture wasstirred at ambient temperature for 6 hours. The reaction mixture waspartitioned in water and ethyl acetate and extracted with ethyl acetate.Combined organic layers were washed with water, brine, dried over sodiumsulfate and concentrated. The residue was purified by preparative HPLCto afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-(ethoxycarbonyl)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinolineas a white solid 140 mg (60%); NMR (DMSO-d₆), 1.18 (m, 6), 3.26 (m, 10),4.00 (q, 2), 4.04 (s, 3), 4.84 (s, 2), 5.26 (m, 1), 6.82 (q, 1), 7.88(d, 1), 7.48 (s, 1), 7.64 (t, 1), 7.82 (t, 1), 8.06 (d, 1), 8.16 (d, 1),8.86 (d, 1) ppm.

B. In a similar manner, the following compound was prepared:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(ethoxycarbonyl)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline.

C. The compounds prepared in Paragraph A and B and similar compoundswere hydrolyzed under standard hydrolysis conditions to yield thefollowing compounds:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-(carboxymethoxy)phenyl)methyl]aminocarbonyl-4-methoxyquinoline;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-(carboxy)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;    and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(carboxy)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline.

EXAMPLE 7 Compounds of Formula (Ij)

A. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-hydroxyethyl]aminocarbonyl-4-methoxyquinoline(50 mg, 0.116 mmol) in tetrahydrofuran (THF) (2 mL) at 0° C. was addedpotassium hexamethyldisilazide (0.232 mL, 0.5 M in toluene, 0.122 mmol).After 5 minutes, ethyl bromoacetate (0.18 mg, 0.174 mmol) was added. Thereaction mixture was stirred at 0° C. for 1 hour and the reaction wasquenched with water. The resultant solution was partitioned betweenwater and ethyl acetate. The organic layer was concentrated in vacuo toafford an oil (50 mg). The crude product was purified by elution throughsilica gel with 4:1 ethyl acetate-hexanes, dissolved in methanol andtreated with 200 μL 0.25M lithium hydroxide. The reaction mixture wasacidified with 10% HCl and extracted into ethyl acetate and concentratedin vacuo to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(carboxy)methoxyethyl]aminocarbonyl-4-methoxyquinoline(20 mg, 35%); NMR (CDCl₃) 1.25 (t, 6), 3.42-3.95 (m, 10), 4.11-4.23 (m,9), 5.45 (m, 1), 7.55 (t, 1), 7.63 (s, 1), 7.76 (t, 1), 8.05 (d, 1),8.20 (d, 1), 9.05 (d, 1) ppm.

B. In a similar manner, other compounds of formula (Ij) are prepared.

C. The compounds prepared above in Paragraph A and B may be furtherhydrolyzed under standard hydrolysis conditions to yield the followingcompounds:

EXAMPLE 8 Compounds of Formulae (Il) and (Im)

A. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-hydroxyquinoline(80 mg, 0.17 mmol) in N,N-dimethylformamide (DMF) (25 mL) was addedcesium carbonate (454 mg, 1.36 mmol) and tert-butyl bromoacetate (102mg, 0.51 mmol). The reaction mixture was heated at 50° C. After halfhour, the reaction was diluted with 200 mL water, then extracted byethyl acetate (80 mL). The organic layer was separated and dried oversodium sulfate. The solvent was evaporated in vacuo to afford an yellowoil. Purification by flash column on silica gel afforded2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(((1,1-dimethylethoxy)carbonyl)methoxy)carbonylpropyl]aminocarbonyl-4-((1,1-dimethylethoxy)carbonyl)methoxyquinolineNMR (DMSO-d₆) 1.17 (t, 3), 1.37 (s, 9), 1.42 (s, 9), 1.93 (m, 1), 2.08(m, 1), 2.48 (m, 2), 3.31-3.71 (m, 8), 4.03 (q, 2), 4.46 (q, 2), 5.07(m, 3), 7.46 (s, 1), 7.68 (t, 1), 7.85 (t, 1), 8.09 (d, 1), 8.23 (d, 1),8.95 (d, 1) ppm as a solid (110 mg).

B. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(((1,1-dimethylethoxy)carbonyl)methoxy)carbonylpropyl]aminocarbonyl-4-((1,1-dimethylethoxy)carbonyl)methoxyquinoline(38 mg, 0.05 mmol) in 1 mL CH₂Cl₂, was added 2 mL trifluoroacetic acid,then the reaction mixture was stirred at ambient temperature for 3hours. The reaction mixture was evaporated in vacuo to afford an oil.The oil was diluted in water (5 mL), adjusted to pH 4.5 by saturatedNaHCO₃, then extracted by ethyl acetate (3×10 mL). The organic layer wasevaporated in vacuo to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((carboxy)methoxycarbonyl)propyl]aminocarbonyl-4-(carboxy)methoxyquinolineas a white solid (30 mg); NMR (DMSO-d₆), 1.16 (t, 3), 1.90 (m, 1), 2.10(m, 1), 2.45 (m, 2), 3.3-3.9 (m, 8), 4.02 (q, 2), 4.52 (q, 2), 5.04 (m,1), 5.13 (s, 2), 7.46 (s, 1), 7.68 (t, 1), 7.84 (t, 1), 8.08 (d, 1),8.23 (d, 1), 9.95 (m, 1) ppm.

C. In a similar manner, similar compounds of the invention are prepared.

EXAMPLE 9 Compounds of Formula (In)

A. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline(142 mg, 0.30 mmol) in tetrahydrofuran (THF) (5 mL) was added glycinet-butyl ester hydrochloride (44 mg, 0.33 mmol),1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) (64 mg, 0.33 mmol),1-hydroxybenzotriazole (HOBT) (45 mg, 0.33 mmol) anddiisopropylethylamine (DIEA) (0.43 g, 0.33 mmol). The reaction wasstirred at ambient temperature overnight. The resultant solution waspartitioned between water and ethyl acetate. The organic layer wasconcentrated in vacuo to afford an oil. The crude product was purifiedby elution through silica gel with 20:1 methylene chloride-methanol toafford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(((1,1-dimethylethoxycarbonyl)methyl)aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline(62 mg, 35%); NMR (CDCl₃) 1.25 (t, 3), 1.50 (s, 9), 2.00 (m, 1),2.15-2.50 (m, 3), 3.31-3.95 (m, 9), 4.10-4.32 (m, 7), 5.40 (m, 1), 759(t, 1), 7.63 (s, 1), 7.75 (t, 1), 8.14 (d, 1), 8.22 (d, 1), 9.41 (d, 1)ppm.

B. The compound prepared above is hydrolyzed under standard conditionsto yield the compound2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((carboxymethyl)aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline.

C. In a similar manner, similiar compounds of the invention areprepared.

EXAMPLE 10 Compounds of Formula (Ip)

A. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-methoxyquinoline(50 mg, 0.11 mmol) in tetrahydrofuran (THF) (2 mL) was added glycinet-butyl ester hydrochloride (20 mg, 0.12 mmol),1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) (23 mg, 0.12 mmol),1-hydroxybenzotriazole (HOBT) (16 mg, 0.12 mmol) anddiisopropylethylamine (DIEA) (0.16 g, 0.12 mmol). The reaction wasstirred at ambient temperature overnight. The resultant solution waspartitioned between water and ethyl acetate. The organic layer wasconcentrated in vacuo to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((carboxy)methyl)aminocarbonyl)ethyl]-aminocarbonyl-4-methoxyquinolineas an oil.

B. In a similar manner, the following compounds were prepared:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((carboxy)methyl)    (methyl)aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline; NMR    (DMSO-d₆) 1.20 (t, 3), 2.70-3.85 (m, 13), 3.95-4.21 (m, 4), 4.35 (s,    3), 5.45 (m, 1), 7.83 (dd, 1), 7.98 (s, 1), 8.04 (dd, 1), 8.35 (d,    1), 8.41 (d, 1), 9.78 (m, 1) ppm; and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((1,1-dimethylethoxycarbonyl)methyl)(methyl)aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;    NMR (CDCl₃) 1.23 (t, 3), 1.42 (s, 9), 2.80 (m, 1), 3.07 (s, 3),    3.40-3.80 (m, 8), 4.12 (s, 3), 5.65 (m, 1), 7.58 (dd, 1), 7.63 (s,    1), 7.75 (dd, 1), 8.02 (d, 1), 8.21 (d, 1), 8.75 (m, 1) ppm.

EXAMPLE 11 Compounds of Formulae (Iq), (Ir) and (Is)

A. To a solution of N-t-butoxycarbonylhistidine (2 g, 7.05 mmol) in THF(30 mL) was added 1-ethoxycarbonylpiperazine (1.36 mL, 1.3 eq.), EDCI(1.65 g, 1.2 eq.), HOBt (1.2 g, 1.1 eq.) and the reaction mixture wasstirred overnight. The reaction mixture was evaporated in vacuo toafford a crude product, which was dissolved in ethyl acetate, washedwith saturated NaHCO₃, 1 M NaHSO₄ and brine. The organic layer wasevaporated. Flash column chromatography with 2%-6% MeOH in CH₂Cl₂afforded4-ethoxycarbonyl-1-(1-(t-butoxycarbonyl)amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine(820 mg).4-Ethoxycarbonyl-1-(1-(t-butoxycarbonyl)amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine(200 mg, 0.5 mmol) was treated with trifluoroacetic acid/methylenechloride (1:1, 2.0 mL) with stirring at ambient temperture for 1 hour.Evaporation gave4-ethoxycarbonyl-1-(1-amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine,which was treated with methylene chloride and triethylamine (0.5 mL),and the solvents evaporated to again afford4-ethoxycarbonyl-1-(1-amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine.To a solution of 2-carboxy-4-methoxyquinoline (124 mg, 0.61 mmol) in THF(4 mL) was added a mixture of4-ethoxycarbonyl-1-(1-amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine,THF (2 mL), and triethylamine (0.1 mL), followed by addition of EDCI(136 mg, 1.4 eq.), HOBt (98 mg, 1.4 eq.). The resulting mixture wasstirred overnight. The crude product (245 mg, foam) was isolated fromthe reaction mixture by the same methods employed above. Flash columnchromatography with 25%-6% MeOH in methylene chloride afforded2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(imidazol-4-yl)ethyl]aminocarbonyl-4-methoxyquinoline;NMR (CDCl₃) 1.25 (t, 3), 3.10-3.30 (m, 2), 3.20-3.65 (m, 9), 4.10 (m,5), 5.40 (m, 1), 6.90 (s, 1), 7.55-7.60 (m, 3), 7.70 (t, 1), 8.02 (d,1), 8.20 (d, 1), 9.0 (d, 1) ppm.

B. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(imidazol-4-yl)ethyl]aminocarbonyl-4-methoxyquinoline(69 mg, 0.14 mmol) in DMF (2 mL) was added t-butyl bromo acetate (0.026mL, 1.2 eq.), potassium carbonate (30 mg, 1.5 eq), NaI (2.0 mg, 0.1eq.). The reaction mixture was heated at 50° C. for 1 hour. Evaporationfollowed by flash column chromatography with 2%-3% MeOH in methylenechloride afforded2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(1-(t-butoxycarbonyl)methyl)imidazol-4-yl)ethyl]-aminocarbonyl-4-methoxyquinoline (25 mg) which was treated withneat trifluoroacetic acid (0.5 mL) for 1.5 hours at ambient temperature.Repeated evaporation of the solvents and treatment with methylenechloride afforded2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(1-(carboxymethyl)imidazol-4-yl)ethyl]-aminocarbonyl-4-methoxyquinoline(27 mg) as a trifluoroacetic acide salt: NMR (DMSO) 1.20 (t, 3), 3.2-3.6(m, 11), 4.05 (q, 2), 4.1 (s, 3), 5.0 (s, 2), 5.3 (m, 1), 7.45 (s, 1),7.5 (s, 1), 7.65 (t, 1), 7.8 (t, 1), 8.05 (d, 1), 8.16 (d, 1), 8.95(s, 1) ppm.

C. In a similar manner, similar compounds of the invention are prepared.

EXAMPLE 12 Compounds of Formula (It)

A. To a solution of 4-methoxy-2-carboxyquinoline (102 mg, 0.50 mmol) inCH₂Cl₂ (15 mL) was added triethylamine (0.33 mL, 2.36 mmol) and1-hydroxybenzotriazole (HOBT) (80 mg, 0.60 mmol) and1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) (110 mg, 0.60mmol). After 5 minutes,1-ethoxycarbonyl-4-(ethoxycarbonylmethyl)-aminomethylcarbonylpiperazine(150 mg, 0.50 mmol) was added and the reaction mixture was stirredovernight. The reaction mixture was evaporated in vacuo to afford anoil, which was dissolved in ethyl acetate, and washed with saturatedNaHCO₃, 1 M NaHSO₄ and brine. The organic layer was evaporated in vacuoand the crude product was purified by flash column to afford2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl](ethoxycarbonylmethyl)-aminocarbonyl-4-methoxyquinoline(30 mg).

B. To a solution of2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl](ethoxycarbonylmethyl)aminocarbonyl-4-methoxyquinoline(30 mg, 0.06 mmol) in ethanol (1.0 mL), was added a solution of LiOH (6mg, 0.12 mmol) in water (1.0 mL). The resulting reaction mixture wasstirred at ambient temperature for 1 hour. The reaction mixture wasacidified to pH 3 by 2N NaHSO₄, extracted by ethyl acetate (3×20 mL),dried over sodium sulfate, and concentrated in vacuo to afford2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl](carboxymethyl)aminocarbonyl-4-methoxyquinoline(25 mg) as a solid; NMR (DMSO-d₆), 1.20 (m, 3), 3.20-3.60 (m, 8),4.00-4.14 (m, 5), 4.20 (s, 1), 4.35 (s, 1), 4.50 (s, 1), 4.70 (s, 1),7.23 (d, 1), 7.65 (m, 1), 7.80-7.94 (m, 2), 8.17 (m, 1) ppm.

C. In a similar manner, other compounds of formula (It) are prepared.

EXAMPLE 13 Compounds of Formula (Iu)

A. To a solution of2-[carboxymethylcarbonyl][(1,1-dimethylethoxycarbonyl)methyl]aminonaphthalene(270 mg, 0.78 mmol) in CH₂Cl₂ (50 mL) was added triethylamine (0.33 mL,2.36 mmol) and 1-hydroxybenzotriazole (HOBT) (128 mg, 0.91 mmol) and1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI) (238 mg, 1.23mmol). After 5 minutes, 1-ethoxycarbonylpiperazine (0.12 mL, 0.78 mmol)was added and the reaction mixture was stirred overnight. The reactionmixture was evaporated in vacuo to afford an oil, which was dissolved inethyl acetate, and washed with saturated NaHCO₃, 1 M NaHSO₄ and brine.The organic layer was evaporated in vacuo and the crude product waspurified by flash column to afford2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl][(1,1-dimethylethoxycarbonyl)methyl]aminonaphthalene(147 mg).

B. To a solution of2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl][(1,1-dimethylethoxycarbonyl)methyl]aminonaphthalene(147 mg, 0.30 mmol) in CH₂Cl₂ (2.0 mL) was added TFA (3.0 mL). Theresulting reaction mixture was stirred at ambient temperature for 3hours. The reaction mixture was evaporated in vacuo to afford an oil,which was diluted with water (15 mL), adjusted to pH 4.5 by saturatedNaHCO₃, then extracted by ethyl acetate (3×15 mL). The organic layer wasevaporated in vacuo to afford2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl][carboxymethyl]-aminonaphthalene(90 mg) as a solid; NMR (CDCl₃) 1.26 (t, 3), 3.24-3.30 (m, 2), 3.35-3.42(m, 6), 3.57 (m, 2), 4.14 (q, 2), 4.52 (s, 2), 7.48 (d, 1), 7.58 (m, 2),7.84-7.94 (m, 4) ppm.

C. In a similar manner, the following compound was made:

-   2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl][carboxymethyl]amino-4-methoxynaphthalene;    NMR (CDCl₃) 1.24 (t, 3), 3.32-3.60 (m, 8), 4.02 (s, 3), 4.13 (q, 2),    4.48 (s, 2), 6.82 (s, 1), 7.48 (s, 1), 7.57 (m, 2), 7.79 (d, 1),    8.26 (d, 1) ppm.

EXAMPLE 14 Compounds of Formula (Iv) and Formula (Iw)

A. A solution of4-ethoxycarbonyl-1-(1-amino-3-(methoxycarbonyl)propyl)carbonylpiperazine(0.97 g, 3.23 mmol), 2-carboxy-4-chloroquinoline (0.67 g, 3.23 mmol),EDCI (0.68 g, 3.55 mmol) and HOBT (0.48 g, 3.55 mmol) was combined in 30mL of THF. The reaction mixture was stirred overnight at ambienttemperature. The reaction was diluted with ethyl acetate and washed withwater. The organic layer was concentrated to give a dark oil (0.87 g)that was purified by flash chromotography through silica gel with 2:1ethyl acetate-hexanes to provide2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-chloroquinoline(0.46 g). A solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-chloroquinoline(0.15 g, 0.313 mmol) was dissolved in 5 mL THF and LiOH (0.25 M, 1.9 mL,0.47 mmol) was added. The reaction mixture was stirred for 2 hours. Thereaction mixture was concentrated to an oil, acidified with 10% HCl,extracted into ethyl acetate, and concentrated to provide pure2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-chloroquinoline,(167 mg); NMR 1.20 (t, 3), 1.90 (m, 1), 2.05 (m, 1), 2.35 (m, 2),3.35-3.60 (m, 8), 3.65 (m, 2), 4.05 (q, 2), 5.07 (m, 1), 7.95 (m, 1),8.02 (m, 1), 8.23 (s, 1), 8.30 (m, 1), 8.98 (m, 1) ppm.

B. To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-chloroquinoline(150 mg, 0.315 mmol) in DMSO (3.0 mL) was added (R)-3-hydroxypiperidine(68 mg, 0.5 mmol) and DIEA (65 mg, 0.5 mL). The mixture was heated at110° C. for 18 hours. The crude reaction mixture was treated withlithium hydroxide (3.0 mL 0.25 M) for 4 hours. The reaction was purifiedby preparative HPLC to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-hydroxypyrrolidin-1-yl)quinoline(41.0 mg); NMR (DMSO-d₆) 1.2 (t, 3), 2.00-2.20 (m, 4), 2.45 (m, 2),3.30-3.75 (m, 8), 4.05 (q, 2), 4.60 (s, 1), 5.11 (m, 1), 7.39 (s, 1),7.65 (m, 1), 7.95 (m, 1), 8.28 (m, 1), 8.58 (br s, 1), 9.75 (m, 1) ppm.

C. In a similar manner, the following compounds were made from theappropriate amine:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(morpholin-4-yl)quinoline;    NMR (CDCl₃) 1.23 (t, 3), 2.01 (m, 1), 2.20 (m, 1), 2.50-2.63 (m, 2),    3.40-3.80 (m, 8), 3.98 (m, 4), 4.15 (m, 2), 5.25 (m, 1), 7.55 (dd,    1), 7.70 (s, 1), 7.75 (dd, 1), 8.00 (d, 1), 8.20 (d, 1), 9.21 (d, 1)    ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-carboxypiperidin-1-yl)quinoline;    NMR (DMSO-d₆) 1.22 (t, 3), 1.65 (m, 1), 1.75-1.98 (m, 3), 2.06 (m,    2), 2.35 (m, 2), 2.82 (m, 1), 2.96 (m, 1), 3.13 (m, 1), 3.38-3.77    (m, 10), 4.06 (q, 2), 5.06 (m, 1), 7.57 (s, 1), 7.64 (t, 1), 7.79    (t, 1), 8.11 (m, 2), 8.94 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-((dimethylamino)carbonylmethyl)(methyl)aminoquinoline;    NMR (DMSO-d₆) 1.23 (t, 3), 1.95-2.15 (m, 2), 2.41 (dd, 1), 2.98 (s,    3), 3.05 (s, 3), 3.25-3.75 (m, 11), 4.05 (q, 2), 4.85 (m, 2), 5.05    (m, 1), 7.40 (s, 1), 7.65 (dd, 1), 7.99 (dd, 1), 8.25-8.35 (m, 2),    9.75 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)(methyl)aminoquinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.85-2.05 (m, 2), 2.35 (m, 2), 3.20-3.63    (m, 11), 4.01 (q, 2), 4.65 (s, 2), 5.02 (m, 1), 7.55 (s, 1), 7.63    (dd, 1), 7.95 (dd, 1), 8.25 (dd, 1), 9.65 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-methylpiperazin-1-yl)quinoline;    NMR (DMSO-d₆) 1.18 (t, 3), 1.85 (m, 1), 2.05 (m, 1), 2.39 (dd, 2),    2.91 (s, 3), 3.25-3.70 (m, 16), 4.05 (m, 4), 5.15 (m, 1), 7.65 (m,    2), 7.95 (dd, 1), 8.15 (d, 1), 8.22 (d, 1), 9.35 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-hydroxypiperidin-1-yl)quinoline;    NMR (DMSO-d₆) 1.23 (t, 3), 1.78 (m, 2), 1.95-2.20 (m, 4), 2.42 (dd,    2), 3.34-3.82 (m, 10), 4.00 (m, 1), 4.05-4.20 (m, 3), 5.15 (m, 1),    7.70 (dd, 1), 7.78 (s, 1), 7.97 (dd, 1), 8.15 (d, 1), 8.35 (d, 1),    9.75 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-(carboxymethyl)piperazin-1-yl)quinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.80-2.00 (m, 2), 2.35 (m, 2), 3.23-3.45    (m, 6), 3.63 (m, 6), 3.80-4.00 (m, 4), 4.02 (q, 2), 4.25 (s, 2),    5.05 (m, 1), 7.70 (m, 2), 7.93 (dd, 1), 8.10 (dd, 1), 8.24 (dd, 1),    9.39 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-(carboxymethyl)piperazin-1-yl)quinoline;    NMR (DMSO-d₆) 1.20 (t, 3), 1.82-2.10 (m, 2), 2.35 (m, 2), 2.75 (m,    2), 3.25-3.65 (m, 12), 3.90-4.10 (m, 6), 5.05 (m, 1), 7.63 (m, 2),    7.92 (dd, 1), 8.15-8.22 (m, 2), 9.38 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-aminocarbonylpiperidin-1-yl)quinoline;    NMR (DMSO-d₆) 1.23 (t, 3), 1.90-2.20 (m, 6), 2.43 (dd, 2), 2.65 (m,    1), 3.35-3.75 (m, 10), 4.05 (q, 2), 4.35 (m, 2), 5.18 (m, 1), 7.70    (dd, 1), 7.75 (s, 1), 7.98 (dd, 1), 8.18 (d, 1), 8.35 (d, 1), 8.78    (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3-ethoxycarbonylpiperidin-1-yl)quinoline;    NMR (CDCl₃) 1.26 (m, 6), 1.74-2.08 (m, 4), 2.22 (m, 2), 2.57 (m, 2),    2.82-2.98 (m, 2), 3.16 (m, 1), 3.40-3.82 (m, 13), 4.18 (q, 2), 5.27    (m, 1), 7.55 (t, 1), 7.70 (s, 1), 7.76 (t, 1), 8.03 (d, 1), 8.11 (d,    1), 9.01 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-ethoxycarbonylpiperidin-1-yl)quinoline;    NMR (CDCl₃) 1.27 (m, 6), 1.78-2.08 (m, 4), 2.22 (m, 2), 2.57 (m, 2),    2.88 (m, 1), 3.07 (m, 1), 3.28 (m, 1), 3.40-3.82 (m, 10), 4.18 (q,    2), 5.29 (m, 1), 7.57 (t, 1), 7.73 (s, 1), 7.76 (t, 1), 8.05 (d, 1),    8.17 (d, 1), 9.24 (d, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)aminoquinoline;    NMR (CD₃OD) 1.25 (t, 3), 2.0 (m, 1), 2.15 (m, 1), 2.45 (m, 2),    3.40-3.80 (m, 8), 3.90 (s, 2), 4.10 (q, 2), 5.20 (m, 1), 7.05 (s,    1), 7.50 (m, 1), 7.65 (m, 1), 7.85 (m, 1), 8.10 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methyl)(2-(dimethylamino)ethyl)aminoquinoline;    NMR (DMSO-d₆) 1.21 (t, 3), 1.95-2.16 (m, 2), 2.45 (dd, 2), 2.95 (s,    3), 3.34-3.80 (m, 13), 4.09 (q, 2), 4.20 (m, 1), 5.15 (m, 1), 7.60    (s, 1), 7.75 (dd, 1), 8.02 (dd, 1), 8.30-8.40 (m, 2), 9.65 (d, 1)    ppm; and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methyl)    (2-hydroxyethyl)aminoquinoline. NMR (DMSO-d₆) 1.21 (t, 3), 1.95-2.15    (m, 2), 2.55 (s, 3), 3.30-3.75 (m, 11), 3.90 (m, 2), 4.10 (m, 3),    5.15 (m, 1), 7.61 (m, 2), 7.98 (dd, 1), 8.30 (d, 1), 8.55 (d, 1),    9.75 (d, 1) ppm.

D. To a solution of4-ethoxycarbonyl-1-(1-amino-3-(1,1-dimethylethoxycarbonyl)propyl)carbonylpiperazine(100 mg, 0.173 mmol) in 4 mL of CH₃CN was added methyl acrylate (20 μL,0.217 mmol), palladium acetate (5 mg, 0.0173 mmol), palladiumtriphenylphosphine (10 mg, 0.035), and DIEA (30 μL, 0.017 mmol). Thereaction was heated at 85° C. for 25 hours. Aqueous work-up afforded acrude product, which was dissolved in methylene chloride (5.0 mL).Trifluoroacetic acid (5.0 mL) was added to the solution. After 1 hour,the reaction mixture was concentrated in vacuo. The residue wasdissolved in lithium hydroxide (5 mL, 0.25 M). After 6 hours, thedesired product was purified by preparative HPLC to afford2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(2-carboxyethenyl)quinoline(34 mg); NMR (DMSO-d₆) 1.15 (t, 3), 1.80 (m, 1), 2.05 (m, 2), 3.15-3.63(m, 8), 4.02 (q, 2), 5.05 (m, 1), 6.80 (d, 2), 7.75 (t, 1), 7.90 (t, 2),8.20 (d, 1), 8.30-8.38 (m, 3), 8.99 (d, 1) ppm.

E. In a similar manner, other compounds of formula (Iv) and formula (Iw)are prepared.

EXAMPLE 15 Compounds of Formula (1×) and Formula (Iy)

A. To a mixture of 2,4-dicarboxyquinoline (1.085 g, 5 mmol) in methanol(40 mL) was added chlorotrimethylsilane (TMSCI) (1.41 mL), and thereaction mixture was stirred overnight. The reaction mixture turned intoa clear solution. The solvents were evaporated to yield a crude product,2-carboxy-4-methoxycarbonylquinoline. To a solution of2-carboxy-4-methoxycarbonylquinoline (151 mg, 0.65 mmol) in THF (10 mL)was added4-ethoxycarbonyl-1-(1-amino-3-(1,1-dimethylethoxycarbonyl)propyl)carbonylpiperazine(181 mg, 1.05 eq.), EDCI (161 mg, 1.2 eq.), and HOBt (75 mg, 1.1 eq.),and the resulting reaction mixture was stirred overnight. The reactionmixture was evaporated in vacuo to afford a crude product, which wasdissolved in ethyl acetate, washed with saturated NaHCO₃, 1 M NaHSO₄ andbrine. The organic layer was evaporated. Flash column chromatographywith 1%-3% MeOH in CH₂Cl₂ afforded2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(methoxycarbonyl)quinoline(146 mg) which was treated with trifluoroacetic acid (TFA) and CH₂Cl₂(TFA/CH₂Cl₂, 1:1, 1.5 mL) and the resulting reaction mixture was stirredat ambient temperture for 1 hour. Evaporation of the solvents gave2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methoxycarbonyl)quinoline(74 mg). To this was added a mixture of THF:H₂O (2:1, 2 mL) and LiOH (4eq.). The resulting mixture was stirred at ambient temperature for 1.5hours. The pH value was adjusted to between pH 3 and pH 4 with 1 N HClsolution. Extraction of the organic layers with ethyl acetate wasfollowed by evaporation of the solvents to yield2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-carboxyquinoline(39 mg); NMR (CD₃OD) 1.25 (t, 3), 1.99 (m, 1), 2.2 (m, 1), 2.5 (m, 2),3.4-3.9 (m, 8), 4.16 (q, 2), 5.25 (m, 1), 7.75 (m, 1), 7.86 (m, 1), 8.25(m, 3) ppm.

B. Alternatively,2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-(methoxycarbonyl)quinoline(200 mg, 0.359 mmol) was treated with LiOH (2 eq.) in a solution ofTHF:H₂O (3:1, 8 mL). The reaction mixturre was stirred at ambienttemperature for 5 hours. The pH value was adjusted to between pH 3 andpH 4 with 1 N HCl solution. Evaporation of the solvents, extraction withethyl acetate, washing with H₂O and brine, followed by evaporation andflash column chromatography with 100% ethyl acetate, 1-5% MeOH in ethylacetate gave2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-carboxyquinoline(106 mg). To a solution of2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-carboxyquinoline(500 mg (two batches combined), 0.922 mmol) in THF (10 mL) was added1-methyl 5-t-butyl ester glutamic acid (300 mg, 1.5 eq), EDCI (216 mg,1.2 eq.), HOBt (140 mg, 1.1 eq.), and the resulting mixture was stirredovernight. The reaction mixture was evaporated in vacuo to afford acrude product, which was dissolved in ethyl acetate, washed withsaturated NaHCO₃, 1 M NaHSO₄ and brine. The organic layer wasevaporated. Flash column chromatography with 1%-3% MeOH in CH₂Cl₂afforded2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-(methoxycarbonyl)-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline(387 mg); NMR (CDCl₃) 1.28 (t, 3), 1.40 (s, 9), 1.47 (s, 9), 1.83 (m,1), 2.16 (m, 2), 2.35-2.50 (m, 5), 3.5-3.76 (m, 8), 3.8 (s, 3), 4.18 (q,2), 4.85 (m, 1), 5.35 (m, 1), 7.15 (d, 1), 7.65 (m, 1), 7.80 (m, 1),8.20 (d, 1), 8.30 (d, 1), 8.35 (s, 1), 8.70 (d, 1) ppm.

C.2-[1-(4-(Ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-(methoxycarbonyl)-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline(170 mg, 0.229 mmol) was treated with LiOH (2.0 eq.) in a solution ofTHF:H₂O (3:1, 12 mL). The reaction mixture was stirred at ambienttemperature for 5 hours. The pH value of the reaction mixture wasadjusted to between pH 3 and pH 4 with 1 N HCl solution. The reactionmixture was evaporated in vacuo to afford a crude product, which wasdissolved in ethyl acetate, washed with H₂O and brine. The solvent wasevaporated to give2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-carboxy-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline(150 mg); NMR (CD₃ OD) 1.30 (t, 3), 1.40 (s, 9), 1.50 (s, 9), 1.90 (m,1), 2.15 (m, 2), 2.30-2.50 (m, 5), 3.45-3.90 (m, 8), 4.18 (q, 2), 4.75(m, 1), 5.25 (m, 1), 7.75 (m, 1), 7.90 (m, 1), 8.25 (m, 3) ppm.

D. Alternatively,2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-(methoxycarbonyl)-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline(41 mg, 0.055 mmol) was treated with trifluoroacetic acid:methylenechloride (1:1, 0.6 mL) at ambient temperature for 2 hours. Evaporationof the reaction mixture, followed by dilution with methylene chloride,and repeated evaporation of the solvent gave2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-[(1-(methoxycarbonyl)-3-carboxypropyl)aminocarbonyl]quinoline(40 mg) as a trifluoroacetic acid salt; NMR (CD₃OD) 1.25 (t, 3), 1.95(m, 1), 2.18 (m, 2), 2.40 (m, 1), 2.45-2.55 (m, 4), 3.45-3.92 (m, 11),4.16 (q, 2), 4.80 (m, 1), 5.25 (m, 1), 7.72 (t, 1), 7.86 (t, 1),8.21-8.26 (m, 3) ppm.

E. Alternatively,2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-carboxy-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline(136 mg, 0.187 mmol) was treated with trifluoroacetic acid:methylenechloride (1:1, 1.2 mL) at ambient temperature for 1 hour. The solventswere evaporate and resulting residue diluted with methylene chloride,followed by evaporation of the solvent gave2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-[(1,3-dicarboxypropyl)aminocarbonyl]quinoline(112 mg); NMR (CD₃OD) 1.20 (m, 3), 1.90 (m, 1), 2.10 (m, 2), 2.30-2.50(m, 5), 3.40-3.80 (m, 8), 4.10 (m, 2), 4.70 (m, 1), 5.18 (m, 1), 7.60(m, 1), 7.80 (m, 1), 8.20 (m, 3) ppm.

F. In a similar manner as described above, the following compounds ofthe invention were made:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(methoxycarbonylmethyl)aminocarbonylquinoline;    NMR (CDCl₃) 1.30 (t, 3), 1.50 (s, 9), 1.85 (m, 1), 2.20 (m, 1), 2.45    (m, 2), 3.55-3.80 (m, 8), 3.85 (s, 3), 4.20 (q, 2), 4.38 (d, 2),    5.35 (m, 1), 7.20 (d, 1), 7.70 (m, 1), 7.85 (m, 1), 8.20 (d, 1),    8.35 (d, 1), 8.38 (s, 1), 8.65 (m, 1) ppm;-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(carboxymethyl)aminocarbonylquinoline;    NMR (CD₃OD) 1.30 (t, 3), 1.50 (s, 9), 1.90 (m, 1), 2.20 (m, 1), 2.50    (m, 2), 3.45-3.92 (m, 8), 4.18 (q, 2), 4.25 (s, 2), 5.25 (m, 1),    7.75 (m, 1), 7.90 (m, 1), 8.25-8.32 (m, 3) ppm; and-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)aminocarbonylquinoline;    NMR (CD₃OD) 1.30 (t, 3), 1.95 (m, 1), 2.20 (m, 1), 2.50 (m, 2),    3.45-3.90 (m, 8), 4.18 (q, 2), 4.22 (s, 2), 5.25 (m, 1), 7.75 (m,    1), 7.85 (m, 1), 8.25 (m, 3) ppm.

EXAMPLE 16 Compounds of Formula (Iz)

A. To a solution of 2-carboxy-7-chloro-4-mercaptoquinoline HCl salt (75mg, 0.31 mmol) in DMF (3 mL) was added Mel (0.0425 mL, 2.5 eq.) andcesium carbonate (340 mg, 3.5 eq.). The resulting reaction mixture wasstirred at 70° C. overnight. The reaction mixture was diluted with ethylacetate and washed with water, brine, and dried over sodium sulfate. Thesolvent was evaporated. Flash column chromatograpgy with 1%-2% MeOH inmethylene chloride afforded2-(methoxycarbonyl)-7-chloro-4-methylthioquinoline (40 mg). To2-(methoxycarbonyl)-7-chloro-4-methylthioquinoline (40 mg) was addedTHF:H₂O (2:1, 2 mL) and LiOH (10 mg, 1.5 eq.). The reaction mixture wasstirred for 2 hours. The pH was adjusted to pH 4.5 with 1 N HCl.Extraction with ethyl acetate, washing with brine, drying over sodiumsulfate and evaporation gave 2-carboxy-7-chloro-4-methylthioquinoline(29 mg). To a solution of 2-carboxy-7-chloro-4-methylthioquinoline (29mg) in THF (6 mL) and DMF (1 mL) was added4-ethoxycarbonyl-1-(1-amino-3-(1,1-dimethylethoxycarbonyl)propyl)carbonylpiperazine(46 mg, 1.1 eq.), EDCI (28 mg, 1.2 eq.), and HOBt (18 mg, 1.1 eq.). Theresulting reaction mixture was stirred at ambient temperature overnight.The reaction mixture was evaporated in vacuo to afford a crude product,which was dissolved in ethyl acetate, washed with saturated NaHCO₃, 1MNaHSO₄ and brine. The organic layer was evaporated. Flash columnchromatography with 1%-3% MeOH in CH₂Cl₂ afforded the product,2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(methylthio)quinoline(36 mg). The product (32 mg) was treated with TFA:CH₂Cl₂ (1:1, 1 mL) atambient temperature for 2 hours. The solvents were then evaporated toafford the desired product,2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(methylthio)quinoline;NMR (CDCl₃) 1.35 (t, 3), 2.10 (m, 1), 2.25 (m, 1), 2.55 (m, 2), 2.7 (s,3), 3.4-3.9 (m, 8), 4.2 (q, 2), 5.3 (m, 1), 7.55 (d, 1), 7.9 (s, 1),8.02 (d, 1), 8.15 (s, 1) ppm.

B. In a similar manner, the following compound was made:

-   2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-(methylthio)quinoline;    NMR (CDCl₃) 1.30 (t, 3), 2.0 (m, 1), 2.20 (m, 1), 2.55 (m, 2), 2.60    (s, 3), 3.40-3.80 (m, 8), 4.15 (q, 2), 5.30 (m, 1), 7.60 (s, 1),    7.90 (s, 1) 8.05 (s, 1), 9.05 (m, 1) ppm.

EXAMPLE 17 Receptor Binding Studies

The ability of the compounds of the invention to bind to the plateletadenosine diphosphate (“ADP”) receptor was tested using human washedplatelets and rat washed platelets by displacement assays.

Methods:

One day old platelet concentrates were purchased from a local bloodbank. The platelet concentrates were spun at 680 g for 10 minutes andthe resulting pellets were resuspended in modified Tyrode's buffer (135mM NaCl, 3.6 mL KCl, 1.8 mM MgCl₂, 9 mM HEPES, 0.18 mg/mL BSA, 4.5 mMglucose, pH 6.6) supplemented by 2% acid citrate dextrose (ACD). Thisplatelet suspension was spun at 680 g for 10 minutes and the finalpellet was resuspended in platelet binding buffer (20 mM Tris buffer, pH7.5, 140 mM NaCl, 4 mM KCl, 2 mM MgCl₂, 1 mM EDTA, 0.1% BSA, 5 mMglucose, 2 μg/mL aprotinin, and 2 μg/mL leupeptin).

Platelets were isolated from rat whole blood as described in Example 13with the final pellet resuspended in platelet binding buffer. Theplatelet number for binding to rat platelets (5×10⁶ per well) wasnormalized to the number of platelets for binding to human platelet(4-6×10⁶ per well).

Binding reactions were initiated by mixing [³³P]-2-methylthio-ADP(0.3-0.5 nM), test compounds and washed platelets in 96-well plates. Thereactions were kept at ambient temperature for 60 minutes under constantshaking and were stopped by fast-filtration onto 96-well, glass-fiber(GFC) filter plates followed by washing 5 times with ice-cold 50 mM Trisbuffer (pH 7.5). The amount of [³³P]-2-methylthio-ADP bound to thefilters was measured by scintillation counting. Non-specific binding wasdetermined in the presence of 10 μM unlabelled 2-methylthio-ADP.Competition studies were done using a single concentration of[³³P]-2-methylthio-ADP (0.3 nM) and varying concentrations of testcompounds.

Results:

The compounds of the invention, when tested in this assay, demonstratedtheir ability to inhibitor the binding of [³³P]-2-methylthio-ADP bindingto the human platelet ADP receptor and the rat platelet ADP receptor.

EXAMPLE 18 ADP-Induced Aggregation In Vitro Studies

The compounds of the invention were evaluated as functional antagonistsof the platelet ADP receptor using both human and rat washed platelets.

Methods:

Human venous blood was collected from healthy, drug-free volunteers into⅙ volume 3.2% acid/citrate/dextrose. Whole blood fromNembutal-anesthetized rats was collected from the abdominal aorta into{fraction (1/10)} volume 3.8% acid/citrate/dextrose. Platelet richplasma (PRP) was prepared by centrifugation at 800 g for 3-4 successive1.5-minute intervals, with removal of the PRP after each spin.Alternatively, some PRP preps were performed by centrifugation at 100 gfor 15 minutes. Washed platelets were prepared from the PRP bycentrifugation at 680 g for 15 minutes and the platelet pelletresuspended in Tyrode's buffer (137 mM NaCl, 2.7 mM KCl, 12 mM NaHCO₂,0.42 mM NaH₂PO, 1 mM MgCl₂, 2 mM CaCl₂, 0.35% BSA, 5.5 mM glucose, 5 mMHEPES, pH 7.35 supplemented with f.c. 10% ACD solution. The plateletswere washed a total of two times under these acidic conditions and theplatelet pellet collected by centrifugation at 680 g for 15 minutes atambient temperature. The final platelet pellet was resuspended at 2×10⁸platelets/mL in Tyrode's buffer containing 0.02 units/mL apyrase. Thisplatelet suspension was kept at 37° C. for at least 30 minutes prior tostudies.

Inhibition of ADP-induced aggregation was measured at 37° C. in a4-channel aggregometer. The platelet suspension (0.5 mL) was stirred at1200 rpm. Human fibrinogen (400 μg) was added at time zero for 1 minutefollowed by 2 minute pre-incubation in the presence or absence ofantagonist. Platelet aggregation was induced with the addition of 10 or31.6 μM ADP (submaximal response) in human platelets or 3 or 10 μM ADP(submaximal response) in rat and monitored for 5 minutes. ADP-inducedaggregation was quantified by measuring increase in light transmission(%T) compared to Tyrode's buffer control. IC₅₀ values were determinedusing the 4-parameter equation.

Results:

The compounds of the invention, when tested in this assay, demonstratedthe ability to inhibit ADP-induced platelet aggregation in vitro inhuman and rat washed platelets.

EXAMPLE 19 Efficacy Assay

Inhibition of thrombus formation by compounds of the invention wasevaluated in the rat arterio-venous (A-V) shunt model.

Methods:

Male Sprague-Dawley rats (350-400 g, 10-18 per group) were anesthetizedwith Nembutal (65 mg/kg, i.p). The left carotid artery and the rightjugular vein were each cannulated with a piece of PE-50 tubing (8 cm,siliconized). Fifty minutes after anesthesia, the arterial and venouscatheters were connected (A-V shunt) by a piece of shunt tubing (TygonS-50-HL, 6 cm) that contained a silk thread (6-0 silk suture, 10 cm)coated with collagen (Horm, 100 μg/ml). Blood was allowed to flowthrough the A-V shunt for 10 minutes. The amount of thrombus depositedon the silk thread was measured as dry weight (24 hours at ambienttemperature). A compound of the invention (1, 3 and 10 mg/kg) (as theappropriate salt form) or vehicle (15% DMSO in saline, 1 mL/kg) wasinjected via the jugular vein catheter 5 minutes before the A-V shunt.Blood samples (1 mL) were taken immediately before the dosing and at theend of the A-V shunt for measurements of ex vivo platelet aggregationand plasma levels of the compound of the invention.

Results:

When tested in this assay, compounds of the invention demonstrated theability to dose-dependently inhibit platelet aggregation and thrombusformation in the rat A-V shunt model. Both the inhibition of plateletaggregation and thrombus formation were also parallel in relation to thechanges in plasma drug concentrations. Thus, the inhibition of thrombusformation is correlated with the inhibition of platelet aggregationinduced by the compound of the invention.

EXAMPLE 20

This example illustrates the preparation of representativepharmaceutical compositions for oral administration containing acompound of the invention, or a pharmaceutically acceptable saltthereof:

A. Ingredients % wt./wt. Compound of the invention 20.0% Lactose 79.5%Magnesium stearate 0.5%

The above ingredients are mixed and dispensed into hard-shell gelatincapsules containing 100 mg each, one capsule would approximate a totaldaily dosage.

B. Ingredients % wt./wt. Compound of the invention 20.0% Magnesiumstearate 0.9% Starch 8.6% Lactose 69.6% PVP (polyvinylpyrrolidine) 0.9%

The above ingredients with the exception of the magnesium stearate arecombined and granulated using water as a granulating liquid. Theformulation is then dried, mixed with the magnesium stearate and formedinto tablets with an appropriate tableting machine.

C. Ingredients Compound of the invention  0.1 g Propylene glycol 20.0 gPolyethylene glycol 400 20.0 g Polysorbate 80  1.0 g Water q.s. 100 mL

The compound of the invention is dissolved in propylene glycol,polyethylene glycol 400 and polysorbate 80. A sufficient quantity ofwater is then added with stirring to provide 100 mL of the solutionwhich is filtered and bottled.

D. Ingredients % wt./wt. Compound of the invention 20.0% Peanut Oil78.0% Span 60 2.0%

The above ingredients are melted, mixed and filled into soft elasticcapsules.

E. Ingredients % wt./wt. Compound of the invention 1.0% Methyl orcarboxymethyl cellulose 2.0% 0.9% saline q.s. 100 mL

The compound of the invention is dissolved in the cellulose/salinesolution, filtered and bottled for use.

EXAMPLE 21

This example illustrates the preparation of a representativepharmaceutical formulation for parenteral administration containing acompound of the invention, or a pharmaceutically acceptable saltthereof:

Ingredients Compound of the invention 0.02 g Propylene glycol 20.0 gPolyethylene glycol 400 20.0 g Polysorbate 80  1.0 g 0.9% Salinesolution q.s. 100 mL

The compound of the invention is dissolved in propylene glycol,polyethylene glycol 400 and polysorbate 80. A sufficient quantity of0.9% saline solution is then added with stirring to provide 100 mL ofthe I.V. solution which is filtered through a 0.2 m membrane filter andpackaged under sterile conditions.

EXAMPLE 22

This example illustrates the preparation of a representativepharmaceutical composition in suppository form containing a compound ofthe invention, or a pharmaceutically acceptable salt thereof:

Ingredients % wt./wt. Compound of the invention 1.0% Polyethylene glycol1000 74.5% Polyethylene glycol 4000 24.5%

The ingredients are melted together and mixed on a steam bath, andpoured into molds containing 2.5 g total weight.

EXAMPLE 23

This example illustrates the preparation of a representativepharmaceutical formulation for insufflation containing a compound of theinvention, or a pharmaceutically acceptable salt thereof:

Ingredients % wt./wt. Micronized compound of the invention 1.0%Micronized lactose 99.0%

The ingredients are milled, mixed, and packaged in an insufflatorequipped with a dosing pump.

EXAMPLE 24

This example illustrates the preparation of a representativepharmaceutical formulation in nebulized form containing a compound ofthe invention, or a pharmaceutically acceptable salt thereof:

Ingredients % wt./wt. Compound of the invention 0.005% Water 89.995%Ethanol 10.000%

The compound of the invention is dissolved in ethanol and blended withwater. The formulation is then packaged in a nebulizer equipped with adosing pump.

EXAMPLE 25

This example illustrates the preparation of a representativepharmaceutical formulation in aerosol form containing a compound of theinvention, or a pharmaceutically acceptable salt thereof:

Ingredients % wt./wt. Compound of the invention 0.10% Propellant 11/1298.90% Oleic acid 1.00%

The compound of the invention is dispersed in oleic acid and thepropellants. The resulting mixture is then poured into an aerosolcontainer fitted with a metering valve.

All of the U.S. patents, U.S. patent application publications, U.S.patent applications, foreign patents, foreign patent applications andnon-patent publications referred to in this specification and/or listedin the Application Data Sheet, are incorporated herein by reference, intheir entirety.

While the present invention has been described with reference to thespecific embodiments thereof, it should be understood by those skilledin the art that various changes may be made and equivalents may besubstituted without departing from the true spirit and scope of theinvention. In addition, many modifications may be made to adapt aparticular situation, material, composition of matter, process, processstep or steps, to the objective, spirit and scope of the presentinvention. All such modifications are intended to be within the scope ofthe claims appended hereto.

1. A compound of formula (I):

wherein: a and b are independently 1 to 4; A is ═N—; R¹ is hydrogen,alkyl, carboxyalkyl, aryl, aralkyl, alkylcarbonyl,alkoxyalkoxyalkylcarbonyl, aryloxyallcylcarbonyl, carboxyalkylcarbonyl,alkoxycarbonylalkylcarbonyl, alkoxycarbonylalkyl, alkoxycarbonyl,arylcarbonyl, aryloxycarbonyl, aralkoxycarbonyl, cycloalkylcarbonyl,haloalkoxycarbonyl, aminocarbonyl, monoalkylaminocarbonyl,alkoxycarbonylaminocarbonyl, alkylsulfonyl, arylsulfonyl, benzoxazolyl,benzthiazoly, pyridinyl, pyrimidinyl, furanylcarbonyl, thienylcarbonyl,piperidinylcarbonyl, morpholinylcarbonyl or pyridinylcarbonyl; R² ishydrogen, alkyl, aryl, aralkyl, alkylsulfonylalkyl, aralkoxyalkyl,hydroxyalkyl, aminoalkyl, haloalkylsulfonylaminoalkyl,carboxyalkylthioalkyl, alkoxycarbonylalkylthioalkyl, carboxyalkyl,(carboxy)(hydroxy)alkyl, carboxyalkoxyalkyl, alkoxycarbonylalkyl,aralkoxycarbonylalkyl, carboxyalkoxycarbonylalkyl,alkoxycarbonylalkoxycarbonylalkyl, aminocarbonylalkyl,aralkoxycarbonylaminoalkyl, alkoxycarbonylalkylaminocarbonylalkyl,carboxyalkylaminocarbonylalkyl,(alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl,(carboxyalkyl)(alkyl)aminocarbonylalkyl, tetrahydrofuranonyl,imidazolylalkyl, indolylalkyl, triazolylalkyl or tetrazolylalkyl; R³ ishydrogen, alkyl, hydroxy, halo, carboxyalkenyl, alkoxy, alkoxycarbonyl,alkoxycarbonylalkoxy, di(alkoxycarbonyl)alkoxy, carboxyalkoxy,di(carboxy)alkoxy, (carboxy)(hydroxy)alkoxy,(dialkylamino)(carboxy)alkoxy, hydroxyalkoxy, cyanoalkoxy, haloalkoxy,haloalkenyloxy, carboxyalkenyloxy, alkoxycarbonylalkenyloxy,(cycloalkyl)(alkoxycarbonyl)alkoxy, (cycloalkyl)(carboxy)alkoxy,alkylthio, carboxy, (dialkylaminocarbonylalkyl)(alkyl)amino,(carboxyalkyl)(alkyl)axnino, (hydroxyalkyl)(alkyl)amino,(dialkylaminoalkyl)(alkyl)amino, carboxyalkylamino,mono(alkoxycarbonylalkyl)aminocarbonyl, mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono(carboxyalkyl)aminocarbonylalkoxy,mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy,tetrahydrofuranonyloxy, morpholinyl, piperidinyl, pyrrolidinyl,piperazinyl, oxiranylalkoxy or tetrazolylalkoxy; each R⁴ isindependently selected from the group consisting of hydrogen, alkyl,alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy, hydroxy, cyano,alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl, alkylcarbonyl, nitro,amino, monoalkylamino, dialkylaniino, carboxyalkylamino,alkylcarbonylamino, di(alkylcarbonyl)amino, hydroxyalkyl,dialkylaniinoalkyl, carboxyalkoxy, alkoxycarbonylalkoxy,dialkylaminoalkoxy, and pyrrolidinyalkoxy; each R⁵ is independentlyselected from the group consisting of hydrogen, alkyl, hydroxyalkyl,aralkyl, carboxy, alkoxycarbonyl, aralkoxycarbonyl, carboxyalkyl, andalkoxycarbonylalkyl; R⁶ is —N(R⁷)—C(O)— or —C(O)—N(R⁷)—; R⁷ is hydrogen,alkyl, carboxyalkyl, or alkoxycarbonylalkyl; as a single stereoisomer, amixture of individual stereoisomers, or a racemic mixture; or apharmaceutically acceptable salt thereof.
 2. The compound of claim 1wherein: a is 1 or 2; b is 1; A is ═N—; R¹ is alkoxycarbonyl; R² iscarboxyalkyl, alkoxycarbonylalkyl, carboxyalkoxycarbonylalkyl,imidazolylalkyl, indolylalkyl, triazolylalkyl or tetrazolylalkyl; R³ isalkoxy, alkoxycarbonylalkoxy, alkoxycarbonylcycloalkoxy, carboxyalkoxy,carboxycycloalkoxy, aminocarbonylcycloalkoxy, tetrahydrofuranonyloxy,morpholinyl, piperidinyl, pyrrolidinyl, piperazinyl, oxiranylalkoxy ortetrazolylalkoxy; each R⁴ is independently selected from the groupconsisting of hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl,haloalkoxy, hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl,aminocarbonyl, alkylcarbonyl, nitro, amino, monoalkylamino,dialkylamino, carboxyalkylamino, alkylcarbonylamino,di(alkylcarbonyl)amino, hydroxyalkyl, dialkylaminoalkyl, carboxyalkoxy,alkoxycarbonylalkoxy, dialkylaminoalkoxy, and pyrrolidinylalkoxy; R⁵ ishydrogen, alkyl or hydroxalkyl; R⁶ is —N(R⁷)—C(O)—; and R⁷ hydrogen oralkyl.
 3. The compound of claim 2 wherein: a is 1 or 2; b is 1; A is═N—; R¹ is alkoxycarbonyl; R² is carboxyalkyl, alkoxycarbonylalkyl,imidazolylalkyl, indolylalkyl, triazolylalkyl or tetrazolylalkyl; R³ isalkoxy, alkoxycarbonylcycloalkoxy, carboxycycloalkoxy,tetrahydrofuranonyloxy, morpholinyl, piperidinyl, pyrrolidinyl,piperazinyl, oxiranylalkoxy or tetrazolylalkoxy; each R⁴ isindependently selected from the group consisting of hydrogen, alkyl andpyrrolidinylalkoxy; R⁵ is hydrogen, alkyl or hydroxyalkyl; R⁶ is—N(R⁷)—C(O)—; and R⁷ is hydrogen.
 4. The compound of claim 3 wherein R²is carboxyalkyl.
 5. The compound of claim 4 selected from the groupconsisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(oxiranyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(morpholin-4-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-tetrazol-5-ylethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(tetrazol-5-yl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-aminocarbonylpiperidin-1-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-carboxypiperidin-1-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-ethoxycarbonylpiperidin-1-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-methylpiperazin-1-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-hydroxypyrrolidin-1-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-hydroxypiperidin-1-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(4-(carboxymethyl)piperazin-1-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-(carboxymethyl)piperazin-1-yl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(2-carboxy-4-hydroxypyrrolidin-1-yl)ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(tetrazol-5-yl)methoxyquinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-tetrazol-5-ylethoxy)quinoline.6. The compound of claim 3 wherein R² is alkoxycarbonylalkyl.
 7. Thecompound of claim 6 selected from the group consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(tetrahydro-2-oxofuran-3-yl)oxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(oxiranyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3-ethoxycarbonylpiperidin-1-yl)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-4-(1-tetrazol-5-ylethoxy)quinoline.8. The compound of claim 3 wherein R² is imidazolylalkyl, indolylalkyl,triazolylalkyl or tetrazolylalkyl.
 9. The compound of claim 8 selectedfrom the group consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(imidazol-4-yl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(indol-3-yl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(1-(carboxymethyl)imidazol-4-yl)ethyl]-aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(1,2,4-triazol-3-yl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(tetrazol-1-yl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(tetrazol-5-yl)ethyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline.10. The compound of claim 2 wherein: a is 1 or 2; b is 1; A is ═N—; R¹is alkoxycarbonyl; R² is carboxyalkyl, alkoxycarbonylalkyl orcarboxyalkoxycarbonylalkyl; R³ is alkoxy, alkoxycarbonylalkoxy,alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy, carboxyalkoxy orcarboxycycloalkoxy; each R⁴ is independently selected from the groupconsisting of hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl,haloalkoxy, hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl,aminocarbonyl, alkylcarbonyl, nitro, amino, monoalkylamino,dialkylamino, carboxyalkylamino, alkylcarbonylamino,di(alkylcarbonyl)amino, hydroxyalkyl, dialkylaminoalkyl, carboxyalkoxy,alkoxycarbonylalkoxy, and dialkylaminoalkoxy; R⁵ is hydrogen, alkyl orhydroxyalkyl; R⁶ is —N(R⁷)—C(O)—; and R⁷ is hydrogen or alkyl.
 11. Thecompound of claim 10 wherein: R³ is alkoxycarbonylalkoxy; each R⁴ isindependently selected from the group consisting of hydrogen, alkyl andhalo; and R⁵ is hydrogen.
 12. The compound of claim 11 selected from thegroup consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(methoxycarbonyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonylpropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)-2-methylpropoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-methyl-1-(methoxycarbonyl)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(methoxycarbonyl)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)propoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)-2-methylpropoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline.13. The compound of claim 10 wherein: R³ is alkoxycarbonylcycloalkoxy oraminocarbonylcycloalkoxy; and R⁵ is hydrogen.
 14. The compound of claim13 selected from the group consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-(benzyloxy)-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-hydroxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-(aminocarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-fluoro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-fluoro-6-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(1-methylethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methoxy-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dichloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methylthio-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(methoxycarbonyl)cyclobut-1-oxy)quinoline.15. The compound of 10 wherein: R³ is carboxyalkoxycarbonylalkyl orcarboxyalkoxy; and R⁵ is hydrogen.
 16. The compound of 15 selected fromthe group consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((carboxy)methoxycarbonyl)propyl]aminocarbonyl-4-(carboxy)methoxyquinoline2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxy)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-methyl-1-carboxyethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxy-2,2-dimethylpropoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxyethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(carboxy)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-(carboxy)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline;2-[1(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-(carboxy)ethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxypropoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxy-2-methylpropoxy)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-methyl-1-carboxyethoxy)quinoline.17. The compound of claim 10 wherein: R³ is carboxycycloalkoxy; and R⁵is hydrogen.
 18. The compound of claim 17 wherein each R⁴ isindependently selected from the group consisting of alkyl, hydroxyalkyl,alkoxy, halo, haloalkyl, and dialkylaminoalkyl.
 19. The compound ofclaim 18 selected from the group consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-8-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(diethylamino)methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(diethylamino)methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(trifluoromethyl)-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(hydroxymethyl)-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-ethyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-ethyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-fluoro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-bromo-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-difluoro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-fluoro-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(ethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1-methylethoxycarbonyl)propyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-6-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-chloro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-fluoro-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethyl-4-(1-carboxycyclobut-1-oxy)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dichloro-4-(1-carboxycyclobut-1-oxy)quinoline.20. The compound of claim 17 wherein each R⁴ is independently selectedfrom the group consisting of cyano, nitro, amino, monoalkylamino, anddialkylamino.
 21. The compound of claim 20 selected from the groupconsisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-nitro-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-amino-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-cyano-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-cyano-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-nitro-4-(1-carboxycyclobut-1-oxy)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-amino-4-(1-carboxycyclobut-1-oxy)quinoline.22. The compound of claim 17 wherein each R⁴ is independently selectedfrom the group consisting of alkoxy, aralkoxy, haloalkoxy, hydroxy,alkylthio, carboxyalkoxy, alkoxycarbonylalkoxy and dialkylaminoalkoxy.23. The compound of claim 22 selected from the group consisting of thefollowing:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(benzyloxy)-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-n-propoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(carboxy)methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(diethylamino)ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(benzyloxy)-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(carboxy)methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-ethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-(1-methylethoxy)-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-(trifluoromethoxy)-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-trifluoromethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6,7-dimethoxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-hydroxy-4-(1-carboxycyclobut-1-oxy)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-methylthio-4-(1-carboxycyclobut-1-oxy)quinoline.24. The compound of claim 17 wherein each R⁴ is independently selectedfrom the group consisting of hydrogen, carboxy, alkoxycarbonyl,aminocarbonyl and alkylcarbonyl.
 25. The compound of claim 24 selectedfrom the group consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxybutyl]aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-carboxy-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-acetyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-ethoxycarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-acetyl-4-(1-carboxycyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-carboxy-4-(1-carboxycyclobut-1-oxy)quinoline;and;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-6-aminocarbonyl-4-(1-carboxycyclobut-1-oxy)quinoline.26. The compound of claim 10 wherein: R³ is alkoxy; and R⁵ is hydrogen.27. The compound of claim 26 selected from the group consisting of thefollowing:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-4-(1,1-dimethylethoxy)carbonylbutyl]-aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-4-carboxybutyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-carboxyethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-ethoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-((1,1-dimethylethoxy)carbonyl)ethyl]-aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl][methyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-((1,1-dimethylethoxy)carbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-(methoxycarbonyl)pentyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-(carboxy)pentyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-methoxyquinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-methoxyquinoline.28. The compound of claim 10 wherein: R³ is alkoxy; and R⁵ is alkyl orhydroxyalkyl.
 29. The compound of claim 28 selected from the groupconsisting of the following:2-[1-(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-(1-methylethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(2-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(2-(2-methylpropyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-(1-methylethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-(1-hydroxyethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;and2-[1-(3-(1-hydroxyethyl)-4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline.30. The compound of claim 1 wherein: a is 1 or 2; b is 1; A is ═N—; R¹is hydrogen, alkyl, carboxyalkyl, aryl, aralkyl, alkylcarbonyl,alkoxyalkoxyalkylcarbonyl, aryloxyalkylcarbonyl, carboxyalkylcarbonyl,alkoxycarbonylalkylcarbonyl, alkoxycarbonylalkyl, arylcarbonyl,aryloxycarbonyl, aralkoxycarbonyl, cycloalkylcarbonyl,haloalkoxycarbonyl, aminocarbonyl, monoalkylaminocarbonyl,alkoxycarbonylaminocarbonyl, alkylsulfonyl, arylsulfonyl, benzoxazolyl,benzthiazolyl, pyridinyl, pyrimidinyl, furanylcarbonyl, thienylcarbonyl,piperidinylcarbonyl, morpholinylcarbonyl or pyridinylcarbonyl; R² ishydrogen, alkyl, aryl, aralkyl, alkylsulfonylalkyl, aralkoxyalkyl,hydroxyalkyl, aminoalkyl, haloalkylsulfonylaminoalkyl,carboxyalkylthioalkyl, alkoxycarbonylalkylthioalkyl, carboxyalkyl,(carboxy)(hydroxy)alkyl, carboxyalkoxyalkyl, alkoxycarbonylalkyl,aralkoxycarbonylalkyl, carboxyalkoxycarbonylalkyl,alkoxycarbonylalkoxycarbonylalkyl, aminocarbonylalkyl,aralkoxycarbonylaminoalkyl, alkoxycarbonylalkylaminocarbonylalkyl,carboxyalkylaminocarbonylalkyl,(alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl, and(carboxyalkyl)(alkyl)aminocarbonylalkyl; R³ is hydrogen, alkyl, hydroxy,halo, carboxyalkenyl, alkoxy, alkoxycarbonyl, alkoxycarbonylalkoxy,di(alkoxycarbonyl)alkoxy, carboxyalkoxy, di(carboxy)alkoxy,(carboxy)(hydroxy)alkoxy, (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy,cyanoalkoxy, haloalkoxy, haloalkenyloxy, carboxyalkenyloxy,alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,(cycloalkyl)(carboxy)alkoxy, alkylthio, carboxy,(dialkylaminocarbonylalkyl)(alkyl)amino, (carboxyalkyl)(alkyl)amino,(hydroxyalkyl)(alkyl)amino, (dialkylaminoalkyl)(alkyl)amino,carboxyalkylamino, mono(alkoxycarbonylalkyl)aminocarbonyl,mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono(carboxyalkyl)aminocarbonylalkoxy,mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,alkoxycarbonylcycloalkoxy, and aminocarbonylcycloalkoxy; each R⁴ isindependently selected from the group consisting of hydrogen, alkyl,alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy, hydroxy, cyano,alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl, alkylcarbonyl, nitro,amino, monoalkylamino, dialkylamino, carboxyalkylamino,alkylcarbonylamino, di(alkylcarbonyl)amino, hydroxyalkyl,dialkylaminoalkyl, carboxyalkoxy, alkoxycarbonylalkoxy,dialkylaminoalkoxy, and pyrrolidinylalkoxy; each R⁵ is independentlyselected from the group consisting of hydrogen, alkyl, hydroxyalkyl,aralkyl, carboxy, alkoxycarbonyl, aralkoxycarbonyl, carboxyalkyl, andalkoxycarbonylalkyl; R⁶ is —N(R⁷)—C(O)—; and R⁷is hydrogen, alkyl,carboxyalkyl, or alkoxycarbonylalkyl.
 31. The compound of claim 30wherein: R³ is hydrogen or alkoxy; each R⁴ is independently hydrogen,halo or carboxyalkylamino; R⁵ is hydrogen or alkyl; and R⁷ is hydrogenor alkyl.
 32. The compound of claim 31 wherein R¹ is hydrogen, alkyl,aralkyl, carboxyalkyl or alkoxycarbonylalkyl.
 33. The compound of claim32 selected from the group consisting of the following:2-[(piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(2-methyl-4-(4-fluorobenzyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(2-methyl-4-benzylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-benzylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-ethylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(1,1-dimethylethoxy)carbonylmethylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(carboxymethyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-methylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;and2-[1-(2-methyl-4-(benzyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline.34. The compound of claim 31 wherein R¹ is aryl.
 35. The compound ofclaim 34 selected from the group consisting of the following:2-[(4-(2-methyl-5-chlorophenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(3-chlorophenyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(3-methylphenyl)-3-methylpiperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(3-chlorophenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-methyl-4-(3-methylphenyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(3-chlorophenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(3-methyl-4-(3-methylphenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;and2-[(4-(3-methylphenyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.36. The compound of claim 31 wherein R¹ is benzoxazolyl, benzthiazolyl,pyridinyl, pyrimidinyl, furanylcarbonyl, thienylcarbonyl,piperidinylcarbonyl, morpholinylcarbonyl or pyridinylcarbonyl.
 37. Thecompound of claim 36 selected from the group consisting of thefollowing:2-[1-(4-(pyrimidin-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(benzoxazol-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(benzthiazol-2-yl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(pyrimidin-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(benzoxazol-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(benzthiazol-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2-hydroxy-3-chloropyridin-5-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-(2-methylpropyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-(1-methylethyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-benzyl-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(3-(4-hydroxybenzyl)-4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(furan-2-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(pyridin-2-yl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(pyridin-2-yl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(piperidin-4-ylcarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(furan-2-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(thien-2-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(morpholin-4-yl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;and2-[(4-(pyridin-2-yl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.38. The compound of claim 31 wherein R¹ is aminocarbonyl,monoalkylaminocarbonyl or alkoxycarbonylaminocarbonyl.
 39. The compoundof claim 38 selected from the group consisting of the following:2-[1-(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(aminocarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(aminocarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[(4-((1,1-dimethylethyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-((1-methylethyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-((n-propyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-((n-butyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-((n-hexyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-((n-pentyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;and2-[(4-((ethoxycarbonyl)aminocarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.40. The compound of claim 31 wherein R¹ is alkylcarbonyl,alkoxyalkoxyalkylcarbonyl, aryloxyalkylcarbonyl, carboxyalkylcarbonyl,alkoxycarbonylalkylcarbonyl, arylcarbonyl, aryloxycarbonyl,aralkoxycarbonyl, cycloalkylcarbonyl, or haloalkoxycarbonyl.
 41. Thecompound of claim 40 selected from the group consisting of thefollowing:2-[(4-(trichloromethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(benzyloxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(1-chloroethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(phenoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2-carboxyethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(5-(ethoxycarbonyl)pentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(5-carboxypentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(4-acetamidophenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-((2-methoxyethoxy)methyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2-methoxycarbonylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(n-propylsulfonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2,5-dibromophenyl)sulfonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2,6-diflourophenyl)sulfonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(3-bromophenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(4-ethylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(4-n-propylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(4-n-butylphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(phenoxymethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2,2-dimethylpropyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2-ethoxycarbonylethyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(n-propyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(n-pentyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2-phenylcyclopropyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2-bromo-5-methoxyphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;and2-[(4-(n-butyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(3-trifluoromethoxyphenyl)carbonylpiperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.42. The compound of claim 1 wherein: a is 1 or 2; b is 1; A is ═N—; R¹is alkoxycarbonyl; R² is hydrogen, alkyl, aryl, aralkyl,alkylsulfonylalkyl, aralkoxyalkyl, hydroxyalkyl, aminoalkyl,haloalkylsulfonylaminoalkyl, carboxyalkylthioalkyl,alkoxycarbonylalkylthioalkyl, (carboxy)(hydroxy)alkyl,carboxyalkoxyalkyl, aralkoxycarbonylalkyl, carboxyalkoxycarbonylalkyl,alkoxycarbonylalkoxycarbonylalkyl, aminocarbonylalkyl,aralkoxycarbonylaminoalkyl, alkoxycarbonylalkylaminocarbonylalkyl,carboxyalkylaminocarbonylalkyl,(alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl, or(carboxyalkyl)(alkyl)aminocarbonylalkyl; R³ hydrogen, alkyl, hydroxy,halo, carboxyalkenyl, alkoxy, alkoxycarbonyl, alkoxycarbonylalkoxy,di(alkoxycarbonyl)alkoxy, carboxyalkoxy, di(carboxy)alkoxy,(carboxy)(hydroxy)alkoxy, (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy,cyanoalkoxy, haloalkoxy, haloalkenyloxy, carboxyalkenyloxy,alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,(cycloalkyl)(carboxy)alkoxy, alkylthio, carboxy,(dialkylaminocarbonylalkoxy)(alkyl)amino, (carboxyalkyl)(alkyl)amino,(hydroxyalkyl)(alkyl)amino, (dialkylaminoalkyl)(alkyl)amino,carboxyalkylamino, mono(alkoxycarbonylalkyl)aminocarbonyl,mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono(carboxyalkyl)aminocarbonylalkoxy,mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy ortetrahydrofuranonyloxy; each R⁴ is independently selected from the groupconsisting of hydrogen, alkyl, alkoxy, aralkoxy, halo, haloalkyl,haloalkoxy, hydroxy, cyano, alkylthio, carboxy, alkoxycarbonyl,aminocarbonyl, alkylcarbonyl, nitro, amino, monoalkylamino,dialkylamino, carboxyalkylamino, alkylcarbonylamino,di(alkylcarbonyl)amino, hydroxyalkyl, dialkylaniinoalkyl, carboxyalkoxy,alkoxycarbonylalkoxy, dialkylaminoalkoxy, and pyrrolidinylalkoxy; eachR⁵ is independently selected from the group consisting of hydrogen,alkyl, hydroxyalkyl, aralkyl, carboxy, alkoxycarbonyl, aralkoxycarbonyl,carboxyalkyl, and alkoxycarbonylalkyl; R⁶ is —N(R⁷)—C(O)—; and R⁷hydrogen, alkyl, carboxyalkyl, or alkoxycarbonylalkyl.
 43. The compoundof claim 42 wherein: R² is hydrogen, alkyl, aryl, aralkyl, hydroxyalkyl,haloalkylsulfonylaminoalkyl, or alkoxycarbonylalkoxycarbonylalkyl; andR³ is alkyl, halo, carboxyalkenyl, alkoxycarbonyl, alkoxycarbonylalkoxy,di(alkoxycarbonyl)alkoxy, carboxyalkoxy, di(carboxy)alkoxy,(carboxy)(hydroxy)alkoxy, (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy,cyanoalkoxy, haloalkoxy, haloalkenyloxy, carboxyalkenyloxy,alkoxycarbonylalkenyloxy, (cycloalkyl)(alkoxycarbonyl)alkoxy,(cycloalkyl)(carboxy)alkoxy, alkylthio, carboxy,(dialkylaminocarbonylalkyl)(alkyl)amino, (carboxyalkyl)(alkyl)amino,(hydroxyalkyl)(alkyl)amino, (dialkylaminoalkyl)(alkyl)amino,carboxyalkylamino, mono(alkoxycarbonylalkyl)aminocarbonyl,mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono(carboxyalkyl)aminocarbonylalkoxy,mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy, ortetrahydrofuranonyloxy.
 44. The compound of claim 43 selected from thegroup consisting of the following:2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(ethoxycarbonyl)methoxyquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(carboxy)methoxyquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(aminocarbonyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(((1,1-dimethylethoxy)carbonyl)methoxy)-carbonylpropyl]aminocarbonyl-4-((1,1-dimethylethoxy)carbonyl)methoxyquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(ethoxycarbonyl)propoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-carboxypropoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(ethoxycarbonyl)prop-2-en-1-oxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(tetrahydro-2-oxofuran-3-yl)oxyquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-carboxy-3-hydroxypropoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1,1-di(ethoxycarbonyl)methoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1,1-di(carboxy)methoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(ethoxycarbonyl)ethoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-carboxyethoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(3-(carboxy)prop-1-en-1-oxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(methoxycarbonyl)propoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(carboxy)propoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-methyl-1-(ethoxycarbonyl)ethoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-methyl-1-(carboxy)ethoxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-(1-(carboxy)cyclobut-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((trifluoromethyl)sulfonylamino)propyl]aminocarbonyl-7-methyl-4-(1-(ethoxycarbonyl)cyclobut-1-oxy)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((trifluoromethyl)sulfonylamino)propyl]aminocarbonyl-7-methyl-4-(1-carboxycyclobut-1-oxy)quinoline.45. The compound of claim 42 wherein: R² is alkylsulfonylalkyl,aralkoxyalkyl, aminoalkyl, haloalkylsulfonylaminoalkyl,carboxyalkylthioalkyl, alkoxycarbonylalkylthioalkyl,(carboxy)(hydroxy)alkyl, carboxyalkoxyalkyl, aralkoxycarbonylalkyl,carboxyalkoxycarbonylalkyl, alkoxycarbonylalkoxycarbonylalkyl,aminocarbonylalkyl, aralkoxycarbonylaminoalkyl,alkoxycarbonylalkylaminocarbonylalkyl, carboxyalkylaminocarbonylalkyl,(alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl,(carboxyalkyl)(alkyl)aminocarbonylalkyl; and R³ is hydrogen, hydroxy oralkoxy.
 46. The compound of claim 45 selected from the group consistingof the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-((2-chlorobenzyloxy)carbonyl)amino-pentyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxycarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxy)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-5-aminopentyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(benzyloxycarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((carboxy)methyl)aminocarbonyl)ethyl]-aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-ethoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-(1,1-dimethylethoxy)carbonylphenyl)-ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-((methoxycarbonyl)methyl)thioethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(carboxymethyl)thioethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((carboxymethyl)aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(((1,1-dimethylethoxycarbonyl)methyl)aminocarbonyl)propyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((1,1-dimethylethoxycarbonyl)methyl)(methyl)aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(((carboxy)methyl)(methyl)aminocarbonyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(carboxy)methoxyethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(benzyloxycarbonyl)propyl]aminocarbonyl-5-nitroquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-((ethoxycarbonyl)methoxycarbonyl)propyl]aminocarbonyl-5-aminoquinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methylsulfonyl)propyl]aminocarbonyl-4-methoxyquinoline.47. The compound of claim 42 wherein: R² is hydrogen, alkyl, aryl,aralkyl or hydroxyalkyl; and R³ is hydrogen, hydroxy, or alkoxy.
 48. Thecompound of claim 47 selected from the group consisting of thefollowing:2-[(4-(1,1-dimethylethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(3-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(2-methylpropoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(methoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonylethyl]aminocarbonyl-4-methoxyquinoline;2-[(2-methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-phenylethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-methylpropyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(methoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-hydroxyethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-ethoxyquinoline;2-[(3-(benzyloxy)carbonyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(3-carboxy-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl](carboxymethyl)aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(4-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[(2,4-di(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(2-carboxy-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-n-propoxyquinoline;2-[(3-(methoxycarbonyl)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(3-(carboxy)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-hydroxyphenyl)methyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-carboxyphenyl)methyl]aminocarbonyl-4-methoxyquinoline;2-[(2-(methoxycarbonyl)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[(2-(carboxy)methyl-4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-1-(4-(carboxymethoxy)phenyl)methyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-(ethoxycarbonyl)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-(carboxy)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(2-hydroxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-hydroxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(ethoxycarbonyl)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-(carboxy)methoxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(3-carboxyphenyl)ethyl]aminocarbonyl-4-methoxyquinoline;2-[((4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl)carbonyl]amino-4-hydroxyquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonylquinoline;2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-hydroxyquinoline;and2-[(4-(ethoxycarbonyl)piperazin-1-yl)carbonylmethyl]aminocarbonyl-4-methoxyquinoline.49. The compound of claim 1 wherein: a is 1 or 2; b is 1; A is ═N—; R¹is hydrogen or alkoxycarbonyl; R² is carboxyalkyl oralkoxycarbonylalkyl; R³ is hydrogen, hydroxy, halo, carboxyalkenyl,alkoxy, alkoxycarbonyl, di(alkoxycarbonyl)alkoxy, di(carboxy)alkoxy,(carboxy)(hydroxy)alkoxy, (dialkylamino)(carboxy)alkoxy, hydroxyalkoxy,cyanoalkoxy, haloalkoxy, haloalkenyloxy,(cycloalkyl)(alkoxycarbonyl)alkoxy, (cycloalkyl)(carboxy)alkoxy,alkylthio, carboxy, (dialkylaminocarbonylalkyl)(alkyl)amino,(carboxyalkyl)(alkyl)amino, (hydroxyalkyl)(alkyl)amino,(dialkylaminoalkyl)(alkyl)amino, carboxyalkylamino,mono(alkoxycarbonylalkyl)aminocarbonyl, mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,mono(dicarboxyalkyl)aminocarbonyl, dialkylaminocarbonylalkoxy,monoaralkylaminocarbonylalkoxy, mono(carboxyalkyl)aminocarbonylalkoxy,or mono(alkoxycarbonylalkyl)aminocarbonylalkoxy; each R⁴ isindependently selected from the group consisting of hydrogen, alkyl,alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy, hydroxy, cyano,alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl, alkylcarbonyl, nitro,amino, monoalkylamino, dialkylamino, carboxyalkylamino,alkylcarbonylamino, di(alkylcarbonyl)amino, hydroxyalkyl,dialkylaminoalkyl, carboxyalkoxy, alkoxycarbonylalkoxy,dialkylaminoalkoxy, and pyrrolidinylalkoxy; each R⁵ is independentlyselected from the group consisting of hydrogen, alkyl, hydroxyalkyl,aralkyl, carboxy, alkoxycarbonyl, aralkoxycarbonyl, carboxyalkyl, andalkoxycarbonylalkyl; R⁶ is —N(R⁷)—C(O)—; and R⁷is hydrogen, alkyl,carboxyalkyl, or alkoxycarbonylalkyl.
 50. The compound of claim 49wherein R³ is hydrogen, hydroxy, halo, alkoxy, hydroxyalkoxy,haloalkoxy, haloalkenyloxy or alkylthio.
 51. The compound of claim 50selected from the group consisting of the following:2-[1-(piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-(carboxymethyl)aminoquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-di(acetyl)aminoquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5-acetamidoquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-hydroxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-8-methoxy-4-hydroxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-methoxycarbonylpropyl]aminocarbonyl-5-nitroquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(2,2,2-trifluoroethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3,3,3-trifluoropropoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3,3,3-trifluoropropoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(3,4,4-trifluorobut-3-en-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3,4,4-trifluorobut-3-en-1-oxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(2-hydroxyethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(methylthio)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-5,7-dichloro-4-(methylthio)quinoline.52. The compound of claim 49 wherein R³ is carboxyalkenyl,alkoxycarbonyl, di(alkoxycarbonyl)alkoxy, di(carboxy)alkoxy,(carboxy)(hydroxy)alkoxy, (dialkylamino)(carboxy)alkoxy, cyanoalkoxy,(cycloalkyl)(alkoxycarbonyl)alkoxy, (cycloalkyl)(carboxy)alkoxy,carboxy, dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono(carboxyalkyl)aminocarbonylalkoxy, ormono(alkoxycarbonylalkyl)aminocarbonylalkoxy.
 53. The compound of claim52 selected from the group consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(3-hydroxy-1-carboxypropoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(cyanomethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(dimethylaminocarbonyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(dimethylaminocarbonyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(ethoxycarbonylmethylaminocarbonyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1-cyanoethoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(benzylaminocarbonyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(benzylaminocarbonyl)methoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-((carboxy)methylamino)carbonylmethoxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1-carboxy-3-(diethylamino)propoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(methoxycarbonyl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methoxycarbonyl)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-carboxyquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(methoxycarbonyl)propyl]aminocarbonyl-4-(1,1-di(ethoxycarbonyl)methoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(1,1-di(carboxy)methoxy)quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(2-carboxyethenyl)quinoline(34 mg);2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-cyclohexyl-1-carboxymethoxy)quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-methyl-4-(1-cyclohexyl-1-(methoxycarbonyl)methoxy)quinoline.54. The compound of claim 49 wherein R³ ismono(alkoxycarbonylalkyl)aminocarbonyl, mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl, ormono(dicarboxyalkyl)aminocarbonyl.
 55. The compound of claim 54 selectedfrom the group consisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(methoxycarbonylmethyl)aminocarbonylquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]-aminocarbonyl-4-(carboxymethyl)aminocarbonylquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)aminocarbonylquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-(methoxycarbonyl)-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-4-[(1-carboxy-3-(1,1-dimethylethoxycarbonyl)propyl)aminocarbonyl]quinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-[(1-(methoxycarbonyl)-3-carboxypropyl)aminocarbonyl]quinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-[(1,3-dicarboxypropyl)aminocarbonyl]quinoline.56. The compound of claim 49 wherein R³ is(dialkylaminocarbonylalkyl)(alkyl)amino, (carboxyalkyl)(alkyl)amino,(hydroxyalkyl)(alkyl)amino, (dialkylaminoalkyl)(alkyl)amino, orcarboxyalkylamino.
 57. The compound of claim 56 selected from the groupconsisting of the following:2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-((dimethylamino)carbonylmethyl)(methyl)aminoquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)(methyl)aminoquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methyl)(2-hydroxyethyl)aminoquinoline;2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(methyl)(2-(dimethylamino)ethyl)aminoquinoline;and2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-4-(carboxymethyl)aminoquinoline.58. The compound of claim 1 wherein: a is 1; b is 1; A is ═N—; R¹ isalkoxycarbonyl; R² is hydrogen, aralkyl, carboxyalkyl,(carboxy)(hydroxy)alkyl, alkoxycarbonylalkyl, or tetrahydrofuranonyl; R³is hydrogen, alkoxy, or carboxyalkoxy; R⁴ is hydrogen, hydroxy,carboxyalkoxy, or alkoxycarbonylalkoxy; R⁵ is hydrogen; R⁶ is—C(O)—N(R⁷)—; and R⁷ is hydrogen, alkyl or carboxyalkyl.
 59. Apharmaceutical composition useful in treating a mammal having adisease-state characterized by thrombotic activity, which compositioncomprises a pharmaceutically acceptable excipient and a compound offormula (I):

wherein: a and b are independently 1 to 4; A is ═N—; R¹ is hydrogen,alkyl, carboxyalkyl, aryl, aralkyl, alkylcarbonyl,alkoxyalkoxyalkylcarbonyl, aryloxyalkylcarbonyl, carboxyalkylcarbonyl,alkoxycarbonylalkylcarbonyl, alkoxycarbonylalkyl, alkoxycarbonyl,arylcarbonyl, aryloxycarbonyl, aralkoxycarbonyl, cycloalkylcarbonyl,haloalkoxycarbonyl, aminocarbonyl, monoalkylaminocarbonyl,alkoxycarbonylaminocarbonyl, alkylsulfonyl, arylsulfonyl, benzoxazolyl,benzthiazoly, pyridinyl, pyrimidinyl, furanylcarbonyl, thienylcarbonyl,piperidinylcarbonyl, morpholinylcarbonyl or pyridinylcarbonyl; R² ishydrogen, alkyl, aryl, aralkyl, alkylsulfonylalkyl, aralkoxyalkyl,hydroxyalkyl, aminoalkyl, haloalkylsulfonylaminoalkyl,carboxyalkylthioalkyl, alkoxycarbonylalkylthioalkyl, carboxyalkyl,(carboxy)(hydroxy)alkyl, carboxyalkoxyalkyl, alkoxycarbonylalkyl,aralkoxycarbonylalkyl, carboxyalkoxycarbonylalkyl,alkoxycarbonylalkoxycarbonylalkyl, aminocarbonylalkyl,aralkoxycarbonylaminoalkyl, alkoxycarbonylalkylaminocarbonylalkyl,carboxyalkylaminocarbonylalkyl,(alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl,(carboxyalkyl)(alkyl)aminocarbonylalkyl, tetrahydrofuranonyl,imidazolylalkyl, indolylalkyl, triazolylalkyl or tetrazolylalkyl; R³ ishydrogen, alkyl, hydroxy, halo, carboxyalkenyl, alkoxy, alkoxycarbonyl,alkoxycarbonylalkoxy, di(alkoxycarbonyl)alkoxy, carboxyalkoxy,di(carboxy)alkoxy, (carboxy)(hydroxy)alkoxy,(dialkylamino)(carboxy)alkoxy, hydroxyalkoxy, cyanoalkoxy, haloalkoxy,haloalkenyloxy, carboxyalkenyloxy, alkoxycarbonylalkenyloxy,(cycloalkyl)(alkoxycarbonyl)alkoxy, (cycloalkyl)(carboxy)alkoxy,alkylthio, carboxy, (dialkylaminocarbonylalkyl)(alkyl)amino,(carboxyalkyl)(alkyl)amino, (hydroxyalkyl)(alkyl)amino,(dialkylaminoalkyl)(alkyl)amino, carboxyalkylamino,mono(alkoxycarbonylalkyl)aminocarbonyl, mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono(carboxyalkyl)aminocarbonylalkoxy,mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy,tetrahydrofuranonyloxy, morpholinyl, piperidinyl, pyrrolidinyl,piperazinyl, oxiranylalkoxy or tetrazolylalkoxy; each R⁴ isindependently selected from the group consisting of hydrogen, alkyl,alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy, hydroxy, cyano,alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl, alkylcarbonyl, nitro,amino, monoalkylamino, dialkylamino, carboxyalkylamino,alkylcarbonylamino, di(alkylcarbonyl)amino, hydroxyalkyl,dialkylaminoalkyl, carboxyalkoxy, alkoxycarbonylalkoxy,dialkylaminoalkoxy, and pyrrolidinylalkoxy; each R⁵ is independentlyselected from the group consisting of hydrogen, alkyl, hydroxyalkyl,aralkyl, carboxy, alkoxycarbonyl, aralkoxycarbonyl, carboxyalkyl, andalkoxycarbonylalkyl; R⁶ is —N(R⁷)—C(O)— or —C(O)—N(R⁷)—; R⁷ is hydrogen,alkyl, carboxylalkyl, or alkoxycarbonylalkyl; as a single stereoisomer,a mixture of individual stereoisomers, or a racemic mixture; or apharmaceutically acceptable salt thereof.
 60. A method of treating adisease-state characterized by thrombotic activity, which methodcomprises administering to a mammal having a disease-state characterizedby thrombotic activity a therapeutically effective amount of a compoundof formula (I):

wherein: a and b are independently 1 to 4; A is ═N—; R¹ is hydrogen,alkyl, carboxyalkyl, aryl, aralkyl, alkylcarbonyl,alkoxyalkoxyalkylcarbonyl, aryloxyalkylcarbonyl, carboxyalkylcarbonyl,alkoxycarbonylalkylcarbonyl, alkoxycarbonylalkyl, alkoxycarbonyl,arylcarbonyl, aryloxycarbonyl, aralkoxycarbonyl, cycloalkylcarbonyl,haloalkoxycarbonyl, aminocarbonyl, monoalkylaminocarbonyl,alkoxycarbonylaminocarbonyl, alkylsulfonyl, arylsulfonyl, benzoxazolyl,benzthiazoly, pyridinyl, pyrimidinyl, furanylcarbonyl, thienylcarbonyl,piperidinylcarbonyl, morpholinylcarbonyl or pyridinylcarbonyl; R² ishydrogen, alkyl, aryl, aralkyl, alkylsulfonylalkyl, aralkoxyalkyl,hydroxyalkyl, aminoalkyl, haloalkylsulfonylaminoalkyl,carboxyalkylthioalkyl, alkoxycarbonylalkylthioalkyl, carboxyalkyl,(carboxy)(hydroxy)alkyl, carboxyalkoxyalkyl, alkoxycarbonylalkyl,aralkoxycarbonylalkyl, carboxyalkoxycarbonylalkyl,alkoxycarbonylalkoxycarbonylalkyl, aminocarbonylalkyl,aralkoxycarbonylaminoalkyl, alkoxycarbonylalkylaminocarbonylalkyl,carboxyalkylaminocarbonylalkyl,(alkoxycarbonylalkyl)(alkyl)aminocarbonylalkyl,(carboxylalkyl)(alkyl)aminocarbonylalkyl, tetrahydrofuranonyl,imidazolylalkyl, indolylalkyl, triazolylalkyl or tetrazolylalkyl; R³ ishydrogen, alkyl, hydroxy, halo, carboxyalkenyl, alkoxy, alkoxycarbonyl,alkoxycarbonylalkoxy, di(alkoxycarbonyl)alkoxy, carboxyalkoxy,di(carboxy)alkoxy, (carboxy)(hydroxy)alkoxy,(dialkylamino)(carboxy)alkoxy, hydroxyalkoxy, cyanoalkoxy, haloalkoxy,haloalkenyloxy, carboxyalkenyloxy, alkoxycarbonylalkenyloxy,(cycloalkyl)(alkoxycarbonyl)alkoxy, (cycloalkyl)(carboxy)alkoxy,alkylthio, carboxy, (dialkylaminocarbonylalkyl)(alkyl)amino,(carboxyalkyl)(alkyl)amino, (hydroxyalkyl)(alkyl)amino,(dialkylaminoalkyl)(alkyl)amino, carboxyalkylamino,mono(alkoxycarbonylalkyl)aminocarbonyl, mono(carboxyalkyl)aminocarbonyl,mono(di(alkoxycarbonyl)alkyl)aminocarbonyl,mono((alkoxycarbonyl)(carboxy)alkyl)aminocarbonyl,mono(dicarboxyalkyl)aminocarbonyl, aminocarbonylalkoxy,dialkylaminocarbonylalkoxy, monoaralkylaminocarbonylalkoxy,mono(carboxyalkyl)aminocarbonylalkoxy,mono(alkoxycarbonylalkyl)aminocarbonylalkoxy, carboxycycloalkoxy,alkoxycarbonylcycloalkoxy, aminocarbonylcycloalkoxy,tetrahydrofuranonyloxy, morpholinyl, piperidinyl, pyrrolidinyl,piperazinyl, oxiranylalkoxy or tetrazolylalkoxy; each R⁴ isindependently selected from the group consisting of hydrogen, alkyl,alkoxy, aralkoxy, halo, haloalkyl, haloalkoxy, hydroxy, cyano,alkylthio, carboxy, alkoxycarbonyl, aminocarbonyl, alkylcarbonyl, nitro,amino, monoalkylamino, dialkylamino, carboxyalkylamino,alkylcarbonylamino, di(alkylcarbonyl)amino, hydroxyalkyl,dialkylaminoalkyl, carboxyalkoxy, alkoxycarbonylalkoxy,dialkylaminoalkoxy, and pyrrolidinylalkoxy; each R⁵ is independentlyselected from the group consisting of hydrogen, alkyl, hydroxyalkyl,aralkyl, carboxy, alkoxycarbonyl, aralkoxycarbonyl, carboxyalkyl, andalkoxycarbonylalkyl; R⁶ is —N(R⁷)—C(O)— or —C(O)—N(R^(7)—;) R⁷ ishydrogen, alkyl, carboxyalkyl, or alkoxycarbonylalkyl; as a singlestereoisomer, a mixture of individual stereoisomers, or a racemicmixture; or a pharmaceutically acceptable salt thereof.